NEET Biology Principle Of Inheritance And Variation Question Bank

done Mendelism Total Questions - 153

• question_answer1)
  Mendelism is related with [BVP 2003]
  A)
  Heredity in living beings done clear
  B)
  Meiosis during sexual reproduction done clear
  C)
  Mutation in living organisms done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer2)
  The branch of botany dealing with heredity and variation is called [Bihar MDAT 1991; MP PMT 1998]
  A)
  Geobotany done clear
  B)
  Sericulture done clear
  C)
  Genetics done clear
  D)
  Evolution done clear
  View Solution play_arrow

• question_answer3)
  Term 'genetics' was given by [CPMT 1994]
  A)
  Mendel done clear
  B)
  Morgen done clear
  C)
  Bateson done clear
  D)
  Boveri done clear
  View Solution play_arrow

• question_answer4)
  The first "geneticist'' was [RPMT 1984]
  A)
  Engler done clear
  B)
  Mendel done clear
  C)
  Schwann done clear
  D)
  Miller done clear
  View Solution play_arrow

• question_answer5)
  Mendel was born in [MP PMT 1999]
  A)
  17th century done clear
  B)
  18th century done clear
  C)
  19th century done clear
  D)
  8th century done clear
  View Solution play_arrow

• question_answer6)
  Mendel was the native of [CPMT 1993]
  A)
  France done clear
  B)
  Sweden done clear
  C)
  India done clear
  D)
  Austria done clear
  View Solution play_arrow

• question_answer7)
  Mendel studied on pea plant in
  A)
  Vienna University done clear
  B)
  University of Austria done clear
  C)
  Monestry of Brun done clear
  D)
  School of Brun done clear
  View Solution play_arrow

• question_answer8)
  Mendel proposed which of the following term for hereditary units
  A)
  Factor (determiner) done clear
  B)
  Genome done clear
  C)
  Genetic particle done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer9)
  The resemblance of individuals to their progenitors is called [AMU 1990]
  A)
  Heredity done clear
  B)
  Genetics done clear
  C)
  Evolution done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer10)
  In genetics, the use of chequer board was done by
  A)
  Mendel done clear
  B)
  Correns done clear
  C)
  Punnet done clear
  D)
  Darwin done clear
  View Solution play_arrow

• question_answer11)
  Who has putforth Mendel's conclusions in the form of laws
  A)
  Bateson done clear
  B)
  Correns done clear
  C)
  Punnet done clear
  D)
  Johanssen done clear
  View Solution play_arrow

• question_answer12)
  In 1900 A.D. three biologists independently discovered Mendel's principles. They are [RPMT 1997; BHU 1989; MP PMT 2002]
  A)
  De Vries, Correns and Tschermak done clear
  B)
  Sutton, Morgan and Bridges done clear
  C)
  Avery, McLeod and McCarthy done clear
  D)
  Bateson, Punnet and Bridges done clear
  View Solution play_arrow

• question_answer13)
  Preformation theory concerning transmission of characters was given by
  A)
  Swamerdom done clear
  B)
  Aristotle done clear
  C)
  Wolf done clear
  D)
  Pythagorous done clear
  View Solution play_arrow

• question_answer14)
  Which of the following has been used for genetic researches
  A)
  Pisum done clear
  B)
  Neurospora done clear
  C)
  E. coli done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer15)
  Who out of the following was of the strong opinion that acquired characteristics are inherited [CPMT 1987]
  A)
  Lamarck done clear
  B)
  Lysenko done clear
  C)
  Mendel done clear
  D)
  Huxley done clear
  View Solution play_arrow

• question_answer16)
  Who gave first experimental evidence of the polygenic concept of inheritance
  A)
  Galton (1883) done clear
  B)
  Malthus (1828) done clear
  C)
  Nilsson Ehle done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer17)
  Self sterility in "Nicotiana'' was reported by
  A)
  Morgan done clear
  B)
  East done clear
  C)
  Crick done clear
  D)
  Goldberg done clear
  View Solution play_arrow

• question_answer18)
  A complete set of chromosomes inherited as a unit from one parent, is known as [BHU 1980]
  A)
  Karyotype done clear
  B)
  Gene pool done clear
  C)
  Genome done clear
  D)
  Genotype done clear
  View Solution play_arrow

• question_answer19)
  Dominant character in tomato is
  A)
  Red fruit done clear
  B)
  Rounded fruit done clear
  C)
  Violet stem done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer20)
  Organism of pure line is that which produce individuals of
  A)
  Dominant characters done clear
  B)
  Recessive characters done clear
  C)
  Its own characters done clear
  D)
  Intermediate type done clear
  View Solution play_arrow

• question_answer21)
  For obtaining hybrid ratio which characters of the plant are taken into account
  A)
  Dominant characters done clear
  B)
  Recessive characters done clear
  C)
  New characters done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer22)
  Which of the following is regarded as Drosophila of the fungal world
  A)
  Neurospora done clear
  B)
  Aspergillus done clear
  C)
  Mucor done clear
  D)
  Penicillium done clear
  View Solution play_arrow

• question_answer23)
  What is the practical utility of genetics
  A)
  Improvement in qualities of pet animals done clear
  B)
  Improvement in crop quality done clear
  C)
  Improvement in qualities of man done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer24)
  If an offspring shows any one of the characters of either of parents, the
  A)
  Character is said to be hereditary done clear
  B)
  Offspring is hereditary done clear
  C)
  The character is related with cytoplasm done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer25)
  Mendel is famous for his work on  [CPMT 1980, 86, 88, 90, 94]
  A)
  Pisum done clear
  B)
  Drosophila done clear
  C)
  Neurospora done clear
  D)
  Oenothera done clear
  View Solution play_arrow

• question_answer26)
  Which of the following Mendel has selected for his experiment [Bihar MDAT 1995]
  A)
  Garden pea done clear
  B)
  Pigeon pea done clear
  C)
  Sweet pea done clear
  D)
  Moong (e) None of these done clear
  View Solution play_arrow

• question_answer27)
  The main reason for the success of Mendel was
  A)
  Study of all the characters at the same time done clear
  B)
  Study of one character at one time done clear
  C)
  Study of all the plants at the same time done clear
  D)
  Counting of plants done clear
  View Solution play_arrow

• question_answer28)
  Mendel chose pea plants because  [CPMT 1980; MP PMT 1988, 2003; BVP 2003]
  A)
  They were cheap done clear
  B)
  They were having seven pairs of contrasting characters done clear
  C)
  They were easily available done clear
  D)
  Of great economic importance done clear
  View Solution play_arrow

• question_answer29)
  How many pairs of contrasting characters in pea pod were chosen by Mendel [MP PMT 1994, 97; BVP 2003]
  A)
  2 done clear
  B)
  3 done clear
  C)
  4 done clear
  D)
  7 done clear
  View Solution play_arrow

• question_answer30)
  The genes controlling seven traits in pea studied by Mendel were later found to be located on following number of chromosomes [BHU 1994]
  A)
  Seven done clear
  B)
  Four done clear
  C)
  Five done clear
  D)
  Six done clear
  View Solution play_arrow

• question_answer31)
  What is the correct sequence of the following events 1. Formation of the chromosome theory of heredity 2. Experiments which proved that DNA is the hereditary material 3. Mendel's laws of inheritance-discovery [MP PMT 1993] Code:
  A)
  1, 3 and 2 done clear
  B)
  1, 2 and 3 done clear
  C)
  3, 1 and 2 done clear
  D)
  2, 1 and 3 done clear
  View Solution play_arrow

• question_answer32)
  The term "genotype'' was coined by [DPMT 1993]
  A)
  H.J. Muller done clear
  B)
  T. Boveri done clear
  C)
  W.S. Sutton done clear
  D)
  W.L. Johanssen done clear
  View Solution play_arrow

• question_answer33)
  An organism's genetic constitution is called its [AMU 1990]
  A)
  Genotype done clear
  B)
  Phenotype done clear
  C)
  Holotype done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer34)
  If a pea plant is represented by Rr, what type of information is obtained
  A)
  Phenotypic done clear
  B)
  Genotypic done clear
  C)
  Both (a) and (b) done clear
  D)
  About number of chromosomes done clear
  View Solution play_arrow

• question_answer35)
  What type of gametes will form by genotype RrYy  [RPMT 2002]
  A)
  RY, Ry, rY, ry done clear
  B)
  RY, Ry, ry, ry done clear
  C)
  Ry, Ry, Yy, ry done clear
  D)
  Rr, RR, Yy, YY done clear
  View Solution play_arrow

• question_answer36)
  When two individuals are similar in external appearance but differ in their genetic make up, they are called as  [AMU 1991]
  A)
  Phenotype done clear
  B)
  Genotype done clear
  C)
  Homozygous done clear
  D)
  Heterozygous done clear
  View Solution play_arrow

• question_answer37)
  Who proposed the term 'Allelomorph'
  A)
  De Vries done clear
  B)
  Morgan done clear
  C)
  Tschermak done clear
  D)
  Bateson done clear
  View Solution play_arrow

• question_answer38)
  The term 'allelomorphic' implies [MP PMT 1997]
  A)
  Any two characters done clear
  B)
  A pair of contrasting characters done clear
  C)
  Sex linked characters done clear
  D)
  A pair of non-contrasting characters done clear
  View Solution play_arrow

• question_answer39)
  The alleles are [KCET 1994; MHCET 2004]
  A)
  A pair of genes governing a specific character such as tallness or dwarfness done clear
  B)
  Multiple forms of genes done clear
  C)
  Genes governing eye characters done clear
  D)
  Genes present in allosomes done clear
  View Solution play_arrow

• question_answer40)
  Alleles which show independent effect are called [CBSE PMT 1996]
  A)
  Supplementary alleles done clear
  B)
  Codominant alleles done clear
  C)
  Epistatic alleles done clear
  D)
  Complementary alleles done clear
  View Solution play_arrow

• question_answer41)
  When a gene exists in more than one form, the different forms are called [MP PMT 1994; CPMT 2002]
  A)
  Heterozygous done clear
  B)
  Complementary genes done clear
  C)
  Genotypes done clear
  D)
  Alleles done clear
  View Solution play_arrow

• question_answer42)
  An allele is said to be dominant if [CBSE PMT 1999]
  A)
  It is expressed only in heterozygous combination done clear
  B)
  It is expressed only in homozygous combination done clear
  C)
  It is expressed in both homozygous and heterozygous condition done clear
  D)
  It is expressed only in second generation done clear
  View Solution play_arrow

• question_answer43)
  When a true breeding pea plant that has yellow seeds is pollinated by a plant that has green seeds, all the \[{{F}_{1}}\] plants have yellow seeds. This means that the allele for yellow is [MP PMT 1993]
  A)
  Heterozygous done clear
  B)
  Dominant done clear
  C)
  Recessive done clear
  D)
  Lethal done clear
  View Solution play_arrow

• question_answer44)
  In a zygote if the number of alleles is two in alternate forms, the expression of adult would be
  A)
  Recessive done clear
  B)
  Dominant done clear
  C)
  Intermediate done clear
  D)
  Epistatic done clear
  View Solution play_arrow

• question_answer45)
  An organism with two identical alleles for a given trait is  [MP PMT 1993; CPMT 1994]
  A)
  Homozygous done clear
  B)
  Segregating done clear
  C)
  Dominant done clear
  D)
  A hermaphrodite done clear
  View Solution play_arrow

• question_answer46)
  Organisms phenotypically similar but genotypically different are said to be [KCET 1994]
  A)
  Heterozygous done clear
  B)
  Monozygous done clear
  C)
  Multizygous done clear
  D)
  Homozygous done clear
  View Solution play_arrow

• question_answer47)
  When two odd characters are present in a gene, this is known as [RPMT 1999]
  A)
  Bigamous done clear
  B)
  Heterogamous done clear
  C)
  Polymorphic done clear
  D)
  Heteromorphic done clear
  View Solution play_arrow

• question_answer48)
  The hybrids are generally found to be superior to their parents, it is because of
  A)
  Homozygosity done clear
  B)
  Hybrid vigour done clear
  C)
  Parents are generally weak done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer49)
  Which genotype characterises an organism that is heterozygous for two genes [MP PMT 1993]
  A)
  RRYy done clear
  B)
  RrYY done clear
  C)
  RRYY done clear
  D)
  RrYy done clear
  View Solution play_arrow

• question_answer50)
  The dwarfness in plants of \[{{F}_{2}}\] generation is [DPMT 1992]
  A)
  Recessive done clear
  B)
  Dominant done clear
  C)
  Both the above done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer51)
  For understanding the genotype of an offspring which cross should be performed
  A)
  With the parent having dominant characters done clear
  B)
  With the parent having recessive characters done clear
  C)
  With any of the plant done clear
  D)
  With plant showing incomplete dominance done clear
  View Solution play_arrow

• question_answer52)
  In one cross between red flower and white flower the offsprings have red flower in majority and white flowers are much less. In this cross red colour character is [CPMT 1992]
  A)
  Dominant done clear
  B)
  Assorted done clear
  C)
  Recessive done clear
  D)
  Hybrid done clear
  View Solution play_arrow

• question_answer53)
  If two opposite alleles come together, one finding morphological expression masking the other, the fact is described as law of [CPMT 1973, 75]
  A)
  Inheritance done clear
  B)
  Dominance done clear
  C)
  Limiting factor done clear
  D)
  Segregation done clear
  View Solution play_arrow

• question_answer54)
  Pod character i.e. green colour in pea is
  A)
  Dominant done clear
  B)
  Incompletely dominant done clear
  C)
  Recessive character done clear
  D)
  Abnormal character done clear
  View Solution play_arrow

• question_answer55)
  Which of the following is dominant character according to Mendel [AFMC 2000]
  A)
  Dwarf plant and yellow fruit done clear
  B)
  Terminal fruit and wrinkled seed done clear
  C)
  White testa and yellow pericarp done clear
  D)
  Green coloured pod and rounded seed done clear
  View Solution play_arrow

• question_answer56)
  Which is a dominant character of a pod of pea
  A)
  Constricted shape done clear
  B)
  Inflated shape done clear
  C)
  Conical shape done clear
  D)
  Fusiform shape done clear
  View Solution play_arrow

• question_answer57)
  Which of the following pea plants will be always white flowered
  A)
  In which stem is elongated done clear
  B)
  In which stem is short done clear
  C)
  In which seed coat is white done clear
  D)
  In which pod is constricted done clear
  View Solution play_arrow

• question_answer58)
  In Mendel's experiment nature of seed coat, flower colour, position of flower, pod colour, stem height etc. are reffered to as [RPMT 1997]
  A)
  Alleles done clear
  B)
  Genotypes done clear
  C)
  Phenotypes done clear
  D)
  All of above done clear
  View Solution play_arrow

• question_answer59)
  Mendel chose the pea plant to study genetics because of many qualities. One of them which he did not consider was [DPMT 1992]
  A)
  Plant height done clear
  B)
  Plant colour done clear
  C)
  Pod shape done clear
  D)
  Pod colour done clear
  View Solution play_arrow

• question_answer60)
  Mendel enunciated [MP PMT 1995, 98]
  A)
  Two principles of inheritance done clear
  B)
  Three principles of inheritance done clear
  C)
  Four principles of inheritance done clear
  D)
  Five principles of inheritance done clear
  View Solution play_arrow

• question_answer61)
  Mendel formulated some laws which are known as [AMU 1990]
  A)
  Laws of germplasm done clear
  B)
  Laws of origin of species done clear
  C)
  Laws of recapitulation done clear
  D)
  Laws of inheritance done clear
  View Solution play_arrow

• question_answer62)
  The first law of Mendel [CPMT 2003]
  A)
  Law of inheritance done clear
  B)
  Law of variation done clear
  C)
  Law of independent assortment done clear
  D)
  Law of segregation done clear
  View Solution play_arrow

• question_answer63)
  An exception to Mendel's law is [MP PMT 1989; CPMT 1986, 89, 91; Pb. PMT 2000; RPMT 2002]
  A)
  Law of independent assortment done clear
  B)
  Law of segregation done clear
  C)
  Law of dominance done clear
  D)
  Law of linkage done clear
  View Solution play_arrow

• question_answer64)
  When heterozygous tall plants are self-pollinated than tall and dwarf plants are obtained, this is explain to [RPMT 1999]
  A)
  Law of purity of gamete done clear
  B)
  Segregation of law done clear
  C)
  Division in spores done clear
  D)
  Independent assortment done clear
  View Solution play_arrow

• question_answer65)
  Mendel's principle of segregation was based on the separation of alleles in the garden pea during [MP PMT 1993]
  A)
  Pollination done clear
  B)
  Embryonic development done clear
  C)
  Seed formation done clear
  D)
  Gamete formation done clear
  View Solution play_arrow

• question_answer66)
  In Mendelism, linkage was not observed due to [CPMT 1999]
  A)
  Mutation done clear
  B)
  Independent assortment done clear
  C)
  Synapsis done clear
  D)
  Crossing over done clear
  View Solution play_arrow

• question_answer67)
  Mendel's law of heredity can be explained with the help of [CBSE PMT 1999]
  A)
  Mitosis done clear
  B)
  Meiosis done clear
  C)
  Both mitosis and meiosis done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer68)
  A cross between plants having RRYY and rryy composition will yield plants with [MP PMT 1993; BHU 2003]
  A)
  Round and yellow seeds done clear
  B)
  Round and green seeds done clear
  C)
  Wrinkled and yellow seeds done clear
  D)
  Wrinkled and green seeds done clear
  View Solution play_arrow

• question_answer69)
  The genotype of an individual is Rr Bb. How many different types of gametes will it produce based on the law of independent assortment
  A)
  16 done clear
  B)
  9 done clear
  C)
  8 done clear
  D)
  4 done clear
  View Solution play_arrow

• question_answer70)
  How many different kinds of gametes may be produced by an organism with the genotype RrYy [MP PMT 1993]
  A)
  One done clear
  B)
  Two done clear
  C)
  Three done clear
  D)
  Four done clear
  View Solution play_arrow

• question_answer71)
  Which of the following is heterozygous for two pairs of alleles [AMU 1990]
  A)
  TTRR done clear
  B)
  TrRR done clear
  C)
  ttrr done clear
  D)
  TrtR done clear
  View Solution play_arrow

• question_answer72)
  Change of male and female parents during crosses is known as
  A)
  Back cross done clear
  B)
  Test cross done clear
  C)
  Reciprocal cross done clear
  D)
  Monohybrid cross done clear
  View Solution play_arrow

• question_answer73)
  The cross used to ascertain whether the plant is homozygous or heterozygous is [CBSE PMT 1994; CPMT 2001; BHU 1994, 2002]
  A)
  Linkage cross done clear
  B)
  Reciprocal cross done clear
  C)
  Test cross done clear
  D)
  Monohybrid cross done clear
  View Solution play_arrow

• question_answer74)
  A cross between a homozygous recessive and a heterozygous plant is called [BHU 1995; MHCET 2003]
  A)
  Monohybrid cross done clear
  B)
  Dihybrid cross done clear
  C)
  Test cross done clear
  D)
  Back cross done clear
  View Solution play_arrow

• question_answer75)
  Cross between F1 plant and recessive female plant is called [CPMT 1995; RPMT 1995]
  A)
  Back cross done clear
  B)
  Test cross done clear
  C)
  Out cross done clear
  D)
  Mutation done clear
  View Solution play_arrow

• question_answer76)
  In \[{{F}_{2}}\] generation, a phenotypic ratio of 1:1:1:1 exhibits
  A)
  Back cross done clear
  B)
  Monohybrid test cross done clear
  C)
  Lethality done clear
  D)
  Dihybrid test cross done clear
  View Solution play_arrow

• question_answer77)
  A 1: 1 phenotypic ratio in a test cross indicates that the
  A)
  Alleles are codominant done clear
  B)
  Dominant phenotype of parent was heterozygous done clear
  C)
  Alleles segregated independently done clear
  D)
  Alleles are dominant done clear
  View Solution play_arrow

• question_answer78)
  When a cross is made between offspring and its parents, it is known as [MP PMT 1993]
  A)
  Monohybrid cross done clear
  B)
  Dihybrid cross done clear
  C)
  Back cross done clear
  D)
  Reciprocal cross done clear
  View Solution play_arrow

• question_answer79)
  When a plant of \[{{F}_{1}}\] generation is crossed with homozygous dominant parents, it is known as [MP PMT 1998]
  A)
  Simple cross done clear
  B)
  Test cross done clear
  C)
  Back cross done clear
  D)
  Special cross done clear
  View Solution play_arrow

• question_answer80)
  Which of the statement is correct
  A)
  Each back cross is a test cross done clear
  B)
  Each test cross is a back cross done clear
  C)
  Both tests have the same meaning done clear
  D)
  Reappearence of similar characters in a test cross is called a back cross done clear
  View Solution play_arrow

• question_answer81)
  Which of the following is genotypic ratio of 2 Mendel's monohybrid cross [Bihar MDAT 1991; KCET 1994; EAMCET 1993; MP PMT 1996; MP PMT 2005]
  A)
  1 : 3 done clear
  B)
  3 : 1 done clear
  C)
  1 : 2 : 1 done clear
  D)
  1 : 1 : 1 : 1 done clear
  View Solution play_arrow

• question_answer82)
  In a monohybrid cross when \[{{F}_{1}}\] is crossed with homozygous dominant parent then which type of offsprings will obtain [RPMT 2002]
  A)
  Dominant: recessive 3 : 1 done clear
  B)
  Only recessive done clear
  C)
  Dominant : recessive  1 : 1 done clear
  D)
  No recessive done clear
  View Solution play_arrow

• question_answer83)
  A dihybrid for qualitative trait is crossed with homozygous recessive individual of its type, the phenotypic ratio is [Orissa JEE 2005]
  A)
  1 : 2 : 1 done clear
  B)
  3 : 1 done clear
  C)
  1 : 1: 1 : 1 done clear
  D)
  9 : 3 : 3 : 1 done clear
  View Solution play_arrow

• question_answer84)
  Which of the following depicts the Mendel's dihybrid ratio  [Bihar MDAT 1992; RPMT 1995; MP PMT 1995, 98; AFMC 2000; BVP 2001]
  A)
  3 : 1 done clear
  B)
  9 : 3 : 3 : 1 done clear
  C)
  9 : 7 done clear
  D)
  15 : 1 done clear
  View Solution play_arrow

• question_answer85)
  In dihybrid cross, out of 16 plants obtained, the number of genotypes shall be [MP PMT 2001]
  A)
  4 done clear
  B)
  9 done clear
  C)
  16 done clear
  D)
  12 done clear
  View Solution play_arrow

• question_answer86)
  Which genotype represents a true dihybrid condition  [CBSE PMT 1991]
  A)
  Tt Rr done clear
  B)
  tt rr done clear
  C)
  Tt rr done clear
  D)
  Tt RR done clear
  View Solution play_arrow

• question_answer87)
  Pure homozygous offsprings in a dihybrid cross in the \[{{F}_{2}}\] generation will be [AIIMS 1984, 93]
  A)
  1/2 done clear
  B)
  1/4 done clear
  C)
  1/8 done clear
  D)
  1/16 done clear
  View Solution play_arrow

• question_answer88)
  In hybridization, Tt × tt give rise to the progeny of ratio [CBSE PMT 1999; RPMT 1999; BVP 2000; Pb. PMT 2000; BHU 2003]
  A)
  1 : 1 done clear
  B)
  1 : 2 done clear
  C)
  2 : 1 done clear
  D)
  1 : 2: 1 done clear
  View Solution play_arrow

• question_answer89)
  The percentage of heterozygous individuals obtained in \[{{F}_{2}}\] generation from selfing the plants with genotype Rr  would be [AIIMS 1994]
  A)
  24 done clear
  B)
  50 done clear
  C)
  75 done clear
  D)
  100 done clear
  View Solution play_arrow

• question_answer90)
  If in a garden pea plant, a cross is made between red flowered and white flowered plants. What will be the phenotypic ratio in \[{{F}_{2}}\]  generation [AFMC 2000; CBSE PMT 2002;Kerala CET 2003]
  A)
  1 : 2 : 1 done clear
  B)
  9 : 3 : 3 : 1 done clear
  C)
  3 : 1 done clear
  D)
  1 : 3 done clear
  View Solution play_arrow

• question_answer91)
  Self-pollination between Tt and Tt plants results into genotype ratio of
  A)
  3 : 1 done clear
  B)
  1 : 2 : 1 done clear
  C)
  1 : 3 done clear
  D)
  4 : 0 done clear
  View Solution play_arrow

• question_answer92)
  The crossing of a homozygous tall plant with a dwarf in \[{{F}_{2}}\] would yield plants in the ratio of [CPMT 1985]
  A)
  All homozygous dwarf done clear
  B)
  All heterozygous tall done clear
  C)
  One homozygous tall, one homozygous dwarf and two heterozygous tall done clear
  D)
  Two tall and two dwarf done clear
  View Solution play_arrow

• question_answer93)
  Mendel crossed a pure white-flowered recessive pea plant with a dominant pure red-flowered plant. The first generation of hybrids from the cross should show [CPMT 1989, 91; RPMT 1995; MH-CET 2002; DPMT 2003]
  A)
  50% white-flowered and 50% red-flowered plants done clear
  B)
  All red-flowered plants done clear
  C)
  75% red-flowered and 25% white-flowered plants done clear
  D)
  All white-flowered plants done clear
  View Solution play_arrow

• question_answer94)
  If in a dihybrid cross Mendel had used two such characters which have linked, he would have faced difficulty in explaining the results n the basis of his [CBSE PMT 1990]
  A)
  Law of segregation done clear
  B)
  Law of multiple factor hypothesis done clear
  C)
  Law of independent assortment done clear
  D)
  Law of dominance done clear
  View Solution play_arrow

• question_answer95)
  If dwarf pea plant was treated with Gibberellic acid, it grew as tall as the pure tall pea plant. If this treated plant is crossed with a pure tall plant then the phenotypic ratio of is likely to be [AIIMS 1980; BCECE 2005]
  A)
  All dwarf done clear
  B)
  50% dwarf 50% tall done clear
  C)
  75% tall 25% dwarf done clear
  D)
  All tall done clear
  View Solution play_arrow

• question_answer96)
  In pea hybrids between red flowered and white flowered strains were crossed back to pure red flowered strain. The progeny of this cross will have [MP PMT 1990]
  A)
  Red flowers only done clear
  B)
  White flowers only done clear
  C)
  Equal number of red and white flowers done clear
  D)
  Mostly red flowers done clear
  View Solution play_arrow

• question_answer97)
  A farmer crossed a walnut combed chicken with a single combed one and obtained all walnut combed chickens in \[{{F}_{1}}\]. The genotype of the parents was [AIIMS 1993]
  A)
  Rr Pp × rr pp done clear
  B)
  RR PP × rr pp done clear
  C)
  RR pp × rr pp done clear
  D)
  RR Pp × rr pp done clear
  View Solution play_arrow

• question_answer98)
  When an individual is having both the alleles of a contrasting character, it is said to be [CPMT 1993, 94]
  A)
  Homozygous done clear
  B)
  Heterozygous done clear
  C)
  Dioecious done clear
  D)
  Monoecious done clear
  View Solution play_arrow

• question_answer99)
  Who worked on poky strain of Neurospora
  A)
  Marry and Mitchell done clear
  B)
  Ruth Sagar done clear
  C)
  Khorana done clear
  D)
  Crick done clear
  View Solution play_arrow

• question_answer100)
  In sweet pea plants the presence of dominant C and P genes is essential for development of purple colour. The ratio of plants producing flowers of different colours in the progeny of the cross Cc Pp × Cc pp will be [AFMC 1993]
  A)
  2 white and 6 purple coloured flowers done clear
  B)
  2 purple and 6 white coloured flowers done clear
  C)
  3 white and 5 purple coloured flowers done clear
  D)
  3 purple and 5 white coloured flowers done clear
  View Solution play_arrow

• question_answer101)
  When the tall plants with red flowers were crossed with dwarf plants having white flowers, Mendel found the ratio of progeny as [DPMT 1993]
  A)
  1 : 2 : 1 done clear
  B)
  3 : 1 done clear
  C)
  9 : 3 : 3 : 1 done clear
  D)
  1 : 4 : 6 : 4 : 1 done clear
  View Solution play_arrow

• question_answer102)
  Normal maize has starchy seeds which remain smooth when dry. A mutant form has sugary seeds which go crinckled when dry. When a mutant was crossed with a normal plant, an F1 was produced which had smooth seeds. What would be the relative ratios of the different seed types, if the F1 was allowed to self [AIIMS 1993]
  A)
  1 smooth : 3 sugary done clear
  B)
  3 smooth : 1 sugary done clear
  C)
  1 smooth : 1 sugary done clear
  D)
  All sugary done clear
  View Solution play_arrow

• question_answer103)
  If a plant heterozygous for tallness is selfed, the \[{{F}_{2}}\] generation has both tall and dwarf plants. This proves the principle of [CPMT 1984; DPMT 1990]
  A)
  Dominance done clear
  B)
  Segregation done clear
  C)
  Independent assortment done clear
  D)
  Incomplete dominance done clear
  View Solution play_arrow

• question_answer104)
  From a single ear of corn, a farmer planted 200 kernels which produced 140 tall and 40 dwarf plants. The genotype of these offsprings are most likely  [NCERT 1981; DPMT 1993]
  A)
  TT, Tt and tt done clear
  B)
  TT and tt only done clear
  C)
  TT  and Tt only done clear
  D)
  Tt and tt only done clear
  View Solution play_arrow

• question_answer105)
  From a cross Aa BB × aa BB, following genotypic ratio will be obtained in \[{{F}_{1}}\] generation [CBSE PMT 1990]
  A)
  1 Aa BB : 1 aa BB done clear
  B)
  1 Aa BB : 3 aa BB done clear
  C)
  3 Aa BB : 1 aa BB done clear
  D)
  All Aa BB : No aa BB done clear
  View Solution play_arrow

• question_answer106)
  If enough crosses are made between male flies of the genotype 'Aa' and the female flies of the genotype 'aa' to produce about 1000 offsprings. Which one of the following is the most likely distribution of genotypes in the offsprings
  A)
  250 Aa : 750 aa done clear
  B)
  750 Aa : 250 aa done clear
  C)
  243 AA : 517 Aa : 240 aa done clear
  D)
  481 Aa : 519 aa done clear
  View Solution play_arrow

• question_answer107)
  If the cells of an organism heterozygous for two pairs of characters viz. Aa and Bb undergo meiosis, what will be the genotypes of the gametes produced [JIPMER 1994]
  A)
  Aa and Bb done clear
  B)
  AB, aB, Ab and ab done clear
  C)
  aB and Ab done clear
  D)
  Ab and ab done clear
  View Solution play_arrow

• question_answer108)
  In sweet peas, genes C and P are necessary for colour in flowers. The flowers are white in the absence of either or both the genes. What will be the percentage of coloured flowers in the offspring of the cross Cc pp × cc Pp [CMC Vellore 1994]
  A)
  100% done clear
  B)
  75% done clear
  C)
  25% done clear
  D)
  50% done clear
  View Solution play_arrow

• question_answer109)
  If a homozygous red-flowered plant is crossed with a homozygous white-flowered plant, the offspring would be [MP PMT 1994, 97; AIIMS 1999, 2002]
  A)
  Half red-flowered done clear
  B)
  Half white-flowered done clear
  C)
  All red-flowered done clear
  D)
  Half pink-flowered done clear
  View Solution play_arrow

• question_answer110)
  A black hybrid mouse is crossed with a pure brown mouse to produce a total of 24 young ones. Which of the following result is most likely to be correct
  A)
  13 black males and 11 black females done clear
  B)
  11 brown males and 13 brown females done clear
  C)
  8 black males, 10 black females, 3 brown males, 3 brown females done clear
  D)
  5 black males, 6 brown males, 7 black females, 6 brown females done clear
  View Solution play_arrow

• question_answer111)
  Some pure black mice were mistakenly mixed with hybrid black mice. The quickest way to discover whether one individual black mouse is pure is
  A)
  To cross it with pure black mouse and all the offsprings must be black done clear
  B)
  To cross it with a brown mouse and all the offsprings must be black done clear
  C)
  To cross it with a known hybrid black mouse and all the offsprings must be black or brown mice in equal numbers done clear
  D)
  To cross it with a pure brown mouse and all the offsprings must be black or brown in equal numbers done clear
  View Solution play_arrow

• question_answer112)
  When experimenting with the factor of tallness in Pisum sativum, Mendel obtained the results 73.97% tall and 26.03% dwarf from one of the cross. This shows that the parents are
  A)
  Hybrid tall and pure dwarf plant done clear
  B)
  Hybrid tall and pure tall plant done clear
  C)
  Hybrid tall and hybird tall plant done clear
  D)
  Pure tall and pure dwarf plant done clear
  View Solution play_arrow

• question_answer113)
  When Mendel crossed true breeding white-flowered strain of peas with a true breeding red-flowered strain, individuals in the \[{{F}_{2}}\] represented [DPMT 1976]
  A)
  White-flowered plants done clear
  B)
  Red-flowered plants done clear
  C)
  Red-flowered and white-flowered plants in the ratio 3 : 1 done clear
  D)
  Red and white-flowered individuals in the ratio 1 : 1 done clear
  View Solution play_arrow

• question_answer114)
  In a cross between white-flowered parents, \[{{F}_{1}}\] progeny was uniformly purple-flowered. The \[{{F}_{2}}\] progeny showed a phenotypic ratio 9 : 7 between purple-flowered and white-flowered plants. The above result indicates that the flower colour is controlled by
  A)
  Two alleles done clear
  B)
  One allele done clear
  C)
  Three alleles done clear
  D)
  Four alleles done clear
  View Solution play_arrow

• question_answer115)
  In pea plants, red flowers (R) are dominant over to white flowers (r) and tall plants (T) are dominant over to dwarf plants (t). The table below shows the gametes and the possible offsprings produced in a dihybrid cross. The numbers 1 to 16 represent the genotypes of each individual cross (e.g. 3 = RrTT) RT Rt rT rt RT 1 2 3 4 Rt 5 6 7 8 rT 9 10 11 12 rt 13 14 15 16 If plant 7 is crossed with plant 12, then what proportion of the offsprings produced will be homozygous for both the recessive characters
  A)
  50% done clear
  B)
  37.5% done clear
  C)
  25% done clear
  D)
  12.5% done clear
  View Solution play_arrow

• question_answer116)
  In wheat, when a green plant was self-fertilized, the progeny had 209 green seedlings and 14 white seedings. The above result indicates that
  A)
  The parents were heterozygous for two duplicate alleles done clear
  B)
  The parents were true breeding done clear
  C)
  The parents were heterozygous for one allele done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer117)
  The genotypes of a plant variety were TtHh, Tthh, ttHh and tthh, where T = tallness and H = hairy stem. Which one of the following crosses would produce progeny giving a phenotypic ratio approximately 1 : 1 : 1 : 1
  A)
  TtHh × TtHh done clear
  B)
  TtHh × Tthh done clear
  C)
  TtHh × ttHh done clear
  D)
  TtHh × tthh done clear
  View Solution play_arrow

• question_answer118)
  In a certain plant species, red flower colour is incompletely dominant to white flower colour (the heterozygote is pink) and tall stems are completely dominant to dwarf stems. If a tall pink plant (TtRr) is corssed with a tall white plant (TTrr), which one of the following types of plants would be produced in the offsprings
  A)
  Tall pink and tall white done clear
  B)
  Dwarf pink and tall red done clear
  C)
  Dwarf red and tall pink done clear
  D)
  Tall pink and dwarf white done clear
  View Solution play_arrow

• question_answer119)
  From a mating of two dihybrid individuals (AaBb × AaBb), how many of the 16 possible zygote combinations would be expected to contain only two dominant genes
  A)
  One done clear
  B)
  Three done clear
  C)
  Four done clear
  D)
  Six done clear
  View Solution play_arrow

• question_answer120)
  From a mating of two dihybrid individuals (AaBb × AaBb), how many of the 16 possible zygote combinations would be expected to be homozygous dominant for gene
  A)
  One done clear
  B)
  Three done clear
  C)
  Four done clear
  D)
  Six done clear
  View Solution play_arrow

• question_answer121)
  When two genetic loci produce identical phenotypes in cis as well as in trans position, they are considered to be [CBSE PMT 1995; BHU 1999]
  A)
  Pseudo alleles done clear
  B)
  The parts of the same gene done clear
  C)
  Multiple alleles done clear
  D)
  Different genes done clear
  View Solution play_arrow

• question_answer122)
  In Mendelian monohybrid cross, phenotypic ratio in \[{{F}_{2}}\] is 3:1. How many types of gametes are formed in \[{{F}_{1}}\] generation [Bihar MDAT 1995]
  A)
  Only one type done clear
  B)
  Two types done clear
  C)
  Four types done clear
  D)
  Eight types done clear
  View Solution play_arrow

• question_answer123)
  In a dihybrid cross 80 plants are obtained. The ratio of homozygous and heterozygous shall be
  A)
  40 : 40 done clear
  B)
  10 : 70 done clear
  C)
  20 : 60 done clear
  D)
  30 : 50 done clear
  View Solution play_arrow

• question_answer124)
  In a monohybrid cross 120 plants are obtained. The ratio of homozygous and heterozygous shall be
  A)
  40 : 80 done clear
  B)
  60 : 60 done clear
  C)
  20 : 100 done clear
  D)
  10 : 110 done clear
  View Solution play_arrow

• question_answer125)
  If Mendel had studied the seven traits using a plant with 12 chromosomes instead of 14, in what way would his interpretation have been different [CBSE PMT 1998]
  A)
  He could have mapped the chromosome done clear
  B)
  He would have discovered blending or incomplete dominance done clear
  C)
  He would not have discovered the law of independent assortment done clear
  D)
  He would have discovered sex linkage done clear
  View Solution play_arrow

• question_answer126)
  When a heterozygous dominant is crossed with homozygous recessive than ratio of progeny will be [CPMT 1998]
  A)
  1 : 2 done clear
  B)
  2 : 1 done clear
  C)
  3 : 1 done clear
  D)
  1 : 1 done clear
  View Solution play_arrow

• question_answer127)
  How many different types of genetically different gametes will be produced by a heterozygous plant having the genotype AABbCc [CBSE PMT 1998]
  A)
  Two done clear
  B)
  Four done clear
  C)
  Six done clear
  D)
  Nine done clear
  View Solution play_arrow

• question_answer128)
  When AABB and aabb are crossed, in \[{{F}_{2}}\] generation the ratio of AaBb will be [RPMT 1997]
  A)
  1 / 16 done clear
  B)
  2 / 16 done clear
  C)
  8 / 16 done clear
  D)
  4 / 16 done clear
  View Solution play_arrow

• question_answer129)
  Blue flowered and white flowered plant on crossing gave progeny of blue and white flowered in the ratio of 60 : 40. What ratio of blue and white is expected if the blue flowered are self-pollinated [RPMT 1997]
  A)
  76 : 24 done clear
  B)
  40 : 60 done clear
  C)
  52 : 48 done clear
  D)
  84 : 16 done clear
  View Solution play_arrow

• question_answer130)
  When a tall and red flowered individual is crossed with a dwarf and white flowered individual, phenotype in the progeny is dwarf and white. What will be the genotype of tall and red flowered individual [AFMC 2001]
  A)
  TTRR done clear
  B)
  TtRR done clear
  C)
  TtRr done clear
  D)
  TTRr done clear
  View Solution play_arrow

• question_answer131)
  Hybrid vigour is induced by [CPMT 2001]
  A)
  Clonal selection done clear
  B)
  Crossing of plant done clear
  C)
  Crossing two plants done clear
  D)
  Species differentiation done clear
  View Solution play_arrow

• question_answer132)
  Mendel's law of independent assortment is applicable for [Orissa PMT 2002]
  A)
  All genes in all organism done clear
  B)
  All genes of pea plant only done clear
  C)
  All linked genes only done clear
  D)
  All non-linked genes only done clear
  View Solution play_arrow

• question_answer133)
  If at a tall plant is crossed with a dwarf plant and obtained progeny is half tall and half dwarf plants. Then the genotype of progeny will be [BHU 2003]
  A)
  \[TT\times tt\] done clear
  B)
  \[Tt\times tt\] done clear
  C)
  \[TT\times Tt\] done clear
  D)
  \[Tt\times Tt\] done clear
  View Solution play_arrow

• question_answer134)
  A self-fertilizing trihybrid plant forms [CBSE PMT 2004]
  A)
  8 different gametes and 16 different zygotes done clear
  B)
  8 different gametes and 32 different zygotes done clear
  C)
  8 different gametes and 64 different zygotes done clear
  D)
  4 different gametes and 16 different zygotes done clear
  View Solution play_arrow

• question_answer135)
  In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt. [CBSE PMT 2004]
  A)
  75% will be tall with red fruit done clear
  B)
  All the offspring will be tall with red fruit done clear
  C)
  25% will be tall with red fruit done clear
  D)
  50% will be tall with red fruit done clear
  View Solution play_arrow

• question_answer136)
  When a tall plant with rounded seeds (TTRR) is crossed with a dwarf plant with wrinkled seeds (ttrr), the  generation consists of tall plants with rounded seeds. How many types of gametes an  plant would produce [CPMT 2004]
  A)
  One done clear
  B)
  Three done clear
  C)
  Four done clear
  D)
  Eight done clear
  View Solution play_arrow

• question_answer137)
  If a cross is made between AA and aa, the nature of  progeny will be [CPMT 2004]
  A)
  Genotypically AA, phenotypically a done clear
  B)
  Genotypically Aa, phyenotypically a done clear
  C)
  Genotypically Aa, phyenotypically A done clear
  D)
  Genotypically aa, phyenotypically A done clear
  View Solution play_arrow

• question_answer138)
  Which of the following is considered as a recessive character of Mendel [Pb. PMT 2004]
  A)
  Round seed done clear
  B)
  Wrinkled seed done clear
  C)
  Axial flower done clear
  D)
  Green pod done clear
  View Solution play_arrow

• question_answer139)
  Hybrid breakdown refers to the condition when offspring are physiologically inferior to the following generation [DPMT 2004]
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer140)
  A double heterozygous tall plant with yellow colour (colour of cotyledon) is selfed the ratio of dwarf plants with green cotyledon is [MHCET 2002]
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer141)
  Heterozygous purple flower is crossed with recessive white flower. The progeny has the ratio [BVP 2004]
  A)
  All purple done clear
  B)
  All white done clear
  C)
  50% purple, 50% white done clear
  D)
  75% done clear
  View Solution play_arrow

• question_answer142)
  Pure tall plants are crossed with pure dwarf plants. In the \[{{F}_{1}}\] generation all plants were tall. These tall plants of \[{{F}_{1}}\] generation were selfed and the ratio of tall to dwarf plants obtained was 3 : 1. This is called [BHU 2005]
  A)
  Dominance done clear
  B)
  Inheritance done clear
  C)
  Co-dominance done clear
  D)
  Heredity done clear
  View Solution play_arrow

• question_answer143)
  Which plant is used as a model system in the study of plant genetic [AMU 2005]
  A)
  Arabidopsis thalinia done clear
  B)
  Pisum sativum done clear
  C)
  Cicer arietinum done clear
  D)
  Ocimum sanctum done clear
  View Solution play_arrow

• question_answer144)
  Alleles are form of [MP PMT 2005; Haryana PMT 2005]
  A)
  Genes done clear
  B)
  Chromosomes done clear
  C)
  DNA done clear
  D)
  None done clear
  View Solution play_arrow

• question_answer145)
  Laws of Mendel are valid for [MP PMT 2005]
  A)
  Asexual reproduction done clear
  B)
  Sexual reproduction done clear
  C)
  Regetative reproduction done clear
  D)
  All above done clear
  View Solution play_arrow

• question_answer146)
  Mendel's law of sagregation is applicable to [Wardha 2005]
  A)
  Dihybrid cross only done clear
  B)
  Monohybrid cross only done clear
  C)
  Both dihybrid and monohybrid cross done clear
  D)
  Dihybrid but not monochybrid  done clear
  View Solution play_arrow

• question_answer147)
  Which is the functional unit of inheritance [Haryana PMT 2005]
  A)
  Cistron done clear
  B)
  Gene done clear
  C)
  Chromosome done clear
  D)
  Intron done clear
  View Solution play_arrow

• question_answer148)
  Character choosen by Mendel are located on how many chromosome [Haryana PMT 2005]
  A)
  4 done clear
  B)
  14 done clear
  C)
  7 done clear
  D)
  49 done clear
  View Solution play_arrow

• question_answer149)
  Mendel law is still true because [CPMT 1995]
  A)
  It takes place in sexually reproducing plants done clear
  B)
  It takes place in asexually reproducing plants done clear
  C)
  It takes place in both the above plants done clear
  D)
  It takes place in apomictic reproducing plants done clear
  View Solution play_arrow

• question_answer150)
  What is true for expressing recessive characters
  A)
  They are true breeding done clear
  B)
  They are homozygous for related trait done clear
  C)
  They produce one type of gametes for concerning character done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer151)
  Which one of the following operations with flowering plants would be most likely to produce the greatest number of variations in the offsprings 
  A)
  Self-pollination done clear
  B)
  Cross-pollination between a pureline and a hybrid done clear
  C)
  Cross-pollination with another species done clear
  D)
  Cross-pollination between two hybrids done clear
  View Solution play_arrow

• question_answer152)
  The colour of flower in pea is always linked with
  A)
  Cotyledons done clear
  B)
  Pod done clear
  C)
  Leaves done clear
  D)
  Seed coat done clear
  View Solution play_arrow

• question_answer153)
  Mendel was lucky, because [CPMT 1992]
  A)
  He was born in Austria which is a nice country done clear
  B)
  He used pea plant for his experiment which is rich in protein done clear
  C)
  The genes for different characters are located on different chromosomes in Pisum sativum done clear
  D)
  The Pisum sativum is short-lived plant done clear
  View Solution play_arrow