NEET Biology Principle Of Inheritance And Variation Question Bank

done Chromosomes and Genes Total Questions - 161

• question_answer1)
  The haploid condition is found in [NCERT 1982; CPMT 1984]
  A)
  Amoeba done clear
  B)
  Bacteria done clear
  C)
  Ovum done clear
  D)
  Zygote done clear
  View Solution play_arrow

• question_answer2)
  The pairing of bivalent synapsis occur in [DPMT 1985]
  A)
  Leptotene done clear
  B)
  Zygotene done clear
  C)
  Pachytene done clear
  D)
  Diplotene done clear
  View Solution play_arrow

• question_answer3)
  Polytene chromosomes were first observed by [AIIMS 1985; BHU 1983]
  A)
  Batanetzky-1980 done clear
  B)
  Heitz and Bauer -1935 done clear
  C)
  Balbiani - 1881 done clear
  D)
  Stevens and Wilson - 1905 done clear
  View Solution play_arrow

• question_answer4)
  The terminal end of a chromosome is called [CPMT 1978]
  A)
  Centromere done clear
  B)
  Chromomere done clear
  C)
  Telomere done clear
  D)
  Metamere done clear
  View Solution play_arrow

• question_answer5)
  The puffs and rings are associated with the [JIPMER 1990]
  A)
  Endoplasmic reticulum done clear
  B)
  Polytene chromosomes done clear
  C)
  Golgi bodies done clear
  D)
  Nucleus done clear
  View Solution play_arrow

• question_answer6)
  Centromere is a part of chromosome which helps in the [NCERT 1978; MP PMT 1998; BHU 2001]
  A)
  Division of centrosomes done clear
  B)
  Formation of spindle fibres done clear
  C)
  Movement of chromosomes done clear
  D)
  Formation of nuclear spindle done clear
  View Solution play_arrow

• question_answer7)
  Exchange of chromosome segments between maternal and paternal chromatids during synapsis in meiosis is called [CPMT 1976]
  A)
  Linkage done clear
  B)
  Crossing over done clear
  C)
  Dominance done clear
  D)
  Mutation done clear
  View Solution play_arrow

• question_answer8)
  Chromosome set in zygote is [CPMT 1989]
  A)
  2n done clear
  B)
  1n done clear
  C)
  3n done clear
  D)
  4n done clear
  View Solution play_arrow

• question_answer9)
  Number of autosomes in human sperm is [CPMT 1983, 84; DPMT 1985; MP PMT 2003]
  A)
  11 done clear
  B)
  22 done clear
  C)
  44 done clear
  D)
  45 done clear
  View Solution play_arrow

• question_answer10)
  The male human is represented by sex chromo-somes [DPMT 1985, 92; CMC Vellore 1993]
  A)
  XX done clear
  B)
  XO done clear
  C)
  XY done clear
  D)
  YY done clear
  View Solution play_arrow

• question_answer11)
  In man, the composition of female destined zygote is [CPMT 1984; DPMT 1985; CMC Vellore 1993]
  A)
  22 + X done clear
  B)
  44 + XX done clear
  C)
  22 + Y done clear
  D)
  44 + XY done clear
  View Solution play_arrow

• question_answer12)
  An unfertilized human egg contains [CPMT 1979, 93; Manipal 1995; MP PMT 2000]
  A)
  Two X chromosomes done clear
  B)
  One X and Y chromosome done clear
  C)
  One Y chromosome only done clear
  D)
  One X chromosome only done clear
  View Solution play_arrow

• question_answer13)
  The structure present over chromosome is [BHU 1987]
  A)
  Nucleolus done clear
  B)
  Centromere done clear
  C)
  Centrochrome done clear
  D)
  Golgi bodies done clear
  View Solution play_arrow

• question_answer14)
  The structure of the chromosome to which spindle fibre is attached is [MP PMT 1995]
  A)
  Chromatid done clear
  B)
  Telomere done clear
  C)
  Centromere done clear
  D)
  Chromomere done clear
  View Solution play_arrow

• question_answer15)
  Who used the word "chromosome" [CPMT 1992; MP PMT 1997]
  A)
  Huxley done clear
  B)
  Flemming 1888 done clear
  C)
  Kollikar 1888 done clear
  D)
  Waldeyer 1888 done clear
  View Solution play_arrow

• question_answer16)
  The theory of recombination of linked gene due to crossing over of chromosome during zygotene of meiosis was put forwarded by [CPMT 1992]
  A)
  T.H. Morgan done clear
  B)
  Punnet done clear
  C)
  Mendel done clear
  D)
  Connes done clear
  View Solution play_arrow

• question_answer17)
  Homologous chromosomes which are present in male and female both are known as
  A)
  Heterosomes done clear
  B)
  Replosomes done clear
  C)
  Androsomes done clear
  D)
  Autosomes done clear
  View Solution play_arrow

• question_answer18)
  How many chromosomes are present in an unfertilized egg
  A)
  22 autosomes and one sex chromosome done clear
  B)
  22 pairs of autosomes and one sex chromosome done clear
  C)
  44 autosomes and one pair of sex chromosome done clear
  D)
  Total 22 chromosomes done clear
  View Solution play_arrow

• question_answer19)
  The distance between two genes in a chromosome is measured in cross-over units which represent [BHU 1982]
  A)
  Ratio of crossing over between them done clear
  B)
  Percentage of crossing over between them done clear
  C)
  Number of crossing over between them done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer20)
  Gene can be defined as [AFMC 1991]
  A)
  Unit of segregation done clear
  B)
  Unit of physiological activity done clear
  C)
  Unit of recombination done clear
  D)
  Unit of function done clear
  View Solution play_arrow

• question_answer21)
  Number of chromosomes present in gorilla is
  A)
  46 done clear
  B)
  44 done clear
  C)
  48 done clear
  D)
  50 done clear
  View Solution play_arrow

• question_answer22)
  The banding pattern indicates that
  A)
  Gibbon, chimpanzee, gorilla and human are fundamentally the same done clear
  B)
  Chromosome material is highly concerned throughout their evolution done clear
  C)
  Differences in banding pattern is due to inversion, translocation etc. done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer23)
  Closer evolutionary relationship of human to chimpanzee, gorilla and orangutan can be observed by
  A)
  Tracing the method of fossilization done clear
  B)
  Banding pattern of chromosomes done clear
  C)
  Karyotype done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer24)
  Banding pattern of present man and chimpanzee is nearly the same.  It indicates that both have
  A)
  Similar gene pool done clear
  B)
  Similar number of chromosomes done clear
  C)
  Evolved from a common stock done clear
  D)
  Developed brain and memory done clear
  View Solution play_arrow

• question_answer25)
  Chromosomes of all races of human are
  A)
  Different done clear
  B)
  Similar done clear
  C)
  Different in banding only done clear
  D)
  Similar in banding only done clear
  View Solution play_arrow

• question_answer26)
  Number of (approximately) genes in E. coli are [CPMT 2005]
  A)
  4000 done clear
  B)
  6000 done clear
  C)
  10000 done clear
  D)
  18000 done clear
  View Solution play_arrow

• question_answer27)
  When two genes are situated very close to each other in a chromosome [AIIMS 1980]
  A)
  The percentage of crossing over between them is very high done clear
  B)
  Hardly any crossing over is detected done clear
  C)
  No crossing over can take place between them done clear
  D)
  Only double cross overs can take place between them done clear
  View Solution play_arrow

• question_answer28)
  Tizo and Levan's contribution is very significant because they [CBSE PMT 1993]
  A)
  Gave the number of human chromosomes done clear
  B)
  Pointed out mutational changes done clear
  C)
  Identified Barr bodies done clear
  D)
  Detected sex linkage done clear
  View Solution play_arrow

• question_answer29)
  Depending upon size and centromere position, the 46 chromosomes have been divided into a number of groups [CBSE PMT 1993; MP PMT 2002]
  A)
  6 done clear
  B)
  5 done clear
  C)
  7 done clear
  D)
  10 done clear
  View Solution play_arrow

• question_answer30)
  The grouping of human chromosomes is based on [CBSE PMT 1993]
  A)
  Secondary constrictions alone done clear
  B)
  Dot-like satellites alone done clear
  C)
  Banding patterns alone done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer31)
  Geneticist plot the relative locations of genes on chromosomes by which of these methods [JIPMER 1993]
  A)
  Using powerful microscopes done clear
  B)
  Calculating the number of genes done clear
  C)
  Determining the frequency of crossing over done clear
  D)
  Exposing animals to radiations done clear
  View Solution play_arrow

• question_answer32)
  The term 'gene' refers to [NCERT 1976]
  A)
  Sequence of amino acids in protein done clear
  B)
  A linkage group done clear
  C)
  A part of RNA done clear
  D)
  A portion of DNA done clear
  View Solution play_arrow

• question_answer33)
  Chromosome having centromere in its middle is [CPMT 2005]
  A)
  Acrocentric done clear
  B)
  Telocentric done clear
  C)
  Metacentric done clear
  D)
  Submetacentric done clear
  View Solution play_arrow

• question_answer34)
  The somatic chromosome complement in all human being is  [CPMT 1977, 79]
  A)
  21 pairs of autosomes and one pair heterosomes done clear
  B)
  23 pairs of autosomes and one pair of heterosomes done clear
  C)
  22 pairs of autosomes and one pair of heterosomes done clear
  D)
  22 pairs of autosomes and one pair of XY chromosomes done clear
  View Solution play_arrow

• question_answer35)
  In man the normal number of chromosomes is  [CPMT 1972; MP PMT 1994]
  A)
  42 done clear
  B)
  44 done clear
  C)
  46 done clear
  D)
  48 done clear
  View Solution play_arrow

• question_answer36)
  A study of heredity and hereditary character is called as [CPMT 1978]
  A)
  Genetics done clear
  B)
  Eugenics done clear
  C)
  Euthenics done clear
  D)
  Cytology done clear
  View Solution play_arrow

• question_answer37)
  The prokaryotic genetic system contains [NCERT 1976]
  A)
  DNA and histones done clear
  B)
  Either DNA or histones done clear
  C)
  DNA but no histones done clear
  D)
  Neither DNA nor histones done clear
  View Solution play_arrow

• question_answer38)
  A male child would be born to parents if [NCERT 1975, 77; CPMT 1973, 83, 86, 93;  DPMT 1983; BHU 1995]
  A)
  Father is healthier than mother done clear
  B)
  Genetic chromosomal constitution of child is XX done clear
  C)
  Mother feeds well during pregnancy done clear
  D)
  Genetic chromosomal constitution of child is XY done clear
  View Solution play_arrow

• question_answer39)
  Who first suggested the idea of circular flow of genetic information
  A)
  Barry Commoner done clear
  B)
  Nirenberg done clear
  C)
  Matthaei done clear
  D)
  Phil Lader done clear
  View Solution play_arrow

• question_answer40)
  Crossing over takes place at a stage between
  A)
  Leptotene and diplotene done clear
  B)
  Pachytene and diplotene done clear
  C)
  Zygotene and pachytene done clear
  D)
  Zygotene and diplotene done clear
  View Solution play_arrow

• question_answer41)
  Sir Archibald is associated with
  A)
  Eugenics done clear
  B)
  Euthenics done clear
  C)
  Genetics done clear
  D)
  Human genetics done clear
  View Solution play_arrow

• question_answer42)
  In an organism that has 44 chromosomes i.e. 22 homologous pairs; at the end of first meiotic division the daughter cell will have [CPMT 1974]
  A)
  44 chromosomes done clear
  B)
  11 chromosomes done clear
  C)
  22 chromosomes done clear
  D)
  Any number between 44 and 22 done clear
  View Solution play_arrow

• question_answer43)
  A child receives [CPMT 1977; CBSE PMT 1995]
  A)
  25% genes form his father done clear
  B)
  50% genes form his father done clear
  C)
  75% genes form his father done clear
  D)
  100% genes from his father done clear
  View Solution play_arrow

• question_answer44)
  The genetic ratio is termed as [DPMT 1982]
  A)
  Dominant done clear
  B)
  Genotype done clear
  C)
  Phenotype done clear
  D)
  Alleles done clear
  View Solution play_arrow

• question_answer45)
  Who of the following is concerned with biochemical genetics
  A)
  Beadle done clear
  B)
  Galton done clear
  C)
  Garrod done clear
  D)
  Mendel done clear
  View Solution play_arrow

• question_answer46)
  A man receives his X chromosomes from
  A)
  His mother only done clear
  B)
  His father only done clear
  C)
  Both his mother and father done clear
  D)
  Either his mother or his father done clear
  View Solution play_arrow

• question_answer47)
  The sum of genes in a population is called [CPMT 1993]
  A)
  Genotype done clear
  B)
  Karyotype done clear
  C)
  Gene pool done clear
  D)
  Lethal gene done clear
  View Solution play_arrow

• question_answer48)
  Arrangement of chromosomes in the order of decreasing length is termed [Manipal 2005]
  A)
  Pedigree done clear
  B)
  Eugenetics done clear
  C)
  Idiogram done clear
  D)
  Dysengenics done clear
  View Solution play_arrow

• question_answer49)
  The condensation of the chromosomes are maximal with visible centromeres at which phase of cell cycle [MP PMT 1994]
  A)
  \[{{G}_{1}}\]phase done clear
  B)
  \[S\]phase done clear
  C)
  \[{{G}_{2}}\]phase done clear
  D)
  \[M\]phase done clear
  View Solution play_arrow

• question_answer50)
  A normal metaphase chromosome with a midial centromere is [MP PMT 1994; Kerala CET 2005]
  A)
  Metacentric done clear
  B)
  Sub-metacentric done clear
  C)
  Acrocentric done clear
  D)
  Telocentric done clear
  View Solution play_arrow

• question_answer51)
  The males of grasshoppers and moths posses two sets of autosomes and [MP PMT 1994]
  A)
  X and Y chromosomes done clear
  B)
  Only X chromosome done clear
  C)
  Only Y chromosome done clear
  D)
  Neither X nor Y chromosome done clear
  View Solution play_arrow

• question_answer52)
  Relative morphologies of chromosomes of an individual indicate his/her [MP PMT 1994]
  A)
  Genotype done clear
  B)
  Phenotype done clear
  C)
  Pedigree chart done clear
  D)
  Karyotype done clear
  View Solution play_arrow

• question_answer53)
  A genome is the [MP PMT 1994]
  A)
  Diploid set of chromosomes done clear
  B)
  Haploid set of chromosomes done clear
  C)
  Triploid set of chromosomes done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer54)
  Jumping genes are now known as [BHU 2005]
  A)
  Transposons done clear
  B)
  Transversion done clear
  C)
  Transduction done clear
  D)
  Transformation done clear
  View Solution play_arrow

• question_answer55)
  Number of autosomes in a normal female is [CPMT 1995]
  A)
  21 done clear
  B)
  22 done clear
  C)
  23 done clear
  D)
  44 done clear
  View Solution play_arrow

• question_answer56)
  The point at which the polytene chromosomes appear to be attached together is known as [CBSE PMT 1995]
  A)
  Centriole done clear
  B)
  Chromocentre done clear
  C)
  Centromere done clear
  D)
  Chromomere done clear
  View Solution play_arrow

• question_answer57)
  Balbiani discovered special type of chromosome from the salivary gland of Chironomus larva which are recognized by the presence of [MP PMT 1995]
  A)
  Bands done clear
  B)
  Loops done clear
  C)
  Both bands and loops done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer58)
  The number of autosomes in man is [MP PMT 1995]
  A)
  22 pairs done clear
  B)
  11 pairs done clear
  C)
  43 pairs done clear
  D)
  23 pairs done clear
  View Solution play_arrow

• question_answer59)
  Polytene or giant chromosomes are found in [KCET 1994; AFMC 1999]
  A)
  Salivary glands of man done clear
  B)
  Salivary glands of woman done clear
  C)
  Salivary glands of all animals done clear
  D)
  Salivary glands of Drosophila done clear
  View Solution play_arrow

• question_answer60)
  Lampbrush chromosomes are visible [CBSE PMT 1996]
  A)
  In diplotene of meiosis done clear
  B)
  In prophase of meiosis done clear
  C)
  In interphase done clear
  D)
  In metaphase of meiosis done clear
  View Solution play_arrow

• question_answer61)
  In chromosomes, the material controlling heredity is
  A)
  DNA done clear
  B)
  Histones done clear
  C)
  Chromocentres done clear
  D)
  RNA done clear
  View Solution play_arrow

• question_answer62)
  Total number of autosomes in fertilized egg of man is
  A)
  44 done clear
  B)
  22 done clear
  C)
  23 done clear
  D)
  46 done clear
  View Solution play_arrow

• question_answer63)
  Lampbrush chromosomes are found inside [CPMT 1999; MP PMT 2002]
  A)
  Salivary glands of Drosophila done clear
  B)
  Salivary glands of silk moth done clear
  C)
  Oocytes of frog done clear
  D)
  Nucleus of man done clear
  View Solution play_arrow

• question_answer64)
  In man, sperms contain autosomes and [KCET 1999]
  A)
  Only Y chromosome done clear
  B)
  Only X chromosome done clear
  C)
  Both X and Y chromosomes done clear
  D)
  Either X or Y chromosomes done clear
  View Solution play_arrow

• question_answer65)
  Drosophila melanogastor has 8 chromosomes in somatic cell. How many linkage groups will be there   [BVP 2000]
  A)
  4 done clear
  B)
  8 done clear
  C)
  2 done clear
  D)
  5 done clear
  View Solution play_arrow

• question_answer66)
  Two sister chromatids are attatched with   [BVP 2000]
  A)
  Spindle fibre done clear
  B)
  Centromere done clear
  C)
  Chromocentre done clear
  D)
  Chromatid done clear
  View Solution play_arrow

• question_answer67)
  Balbiani rings are present in [BVP 2000; MH CET 2001]
  A)
  Polysomes done clear
  B)
  Autosomes done clear
  C)
  Polytene chromosomes done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer68)
  Chromosomes can be stained with [MH CET 2001]
  A)
  Iodine done clear
  B)
  Aniline blue done clear
  C)
  Safranin done clear
  D)
  Carmine  done clear
  View Solution play_arrow

• question_answer69)
  Father of human genetics is [MH CET 2001]
  A)
  Bateson done clear
  B)
  Watson done clear
  C)
  Mendel done clear
  D)
  Archibald Garrod done clear
  View Solution play_arrow

• question_answer70)
  Crossing over takes place between [RPMT 2001]
  A)
  Two chromosomes done clear
  B)
  Two non-homologous chromosomes done clear
  C)
  Two homologous chromosomes done clear
  D)
  None done clear
  View Solution play_arrow

• question_answer71)
  Whereas the number of chromosomes is reduced to half in first reduction division of meiosis, then what is the need for second mitotic division  [MP PMT 2001]
  A)
  For the segregation of replicated chromosomes done clear
  B)
  For equal distribution of haploid chromosomes done clear
  C)
  For the formation of four gametes done clear
  D)
  For equal distribution of genes on chromosomes done clear
  View Solution play_arrow

• question_answer72)
  In humans chromosomal condition of male is [JIPMER 2002]
  A)
  44 AA + XO done clear
  B)
  44 AA + XX done clear
  C)
  44 AA + XY done clear
  D)
  44 AA + XXY done clear
  View Solution play_arrow

• question_answer73)
  The careers of hereditary material are [MP PMT 2002]
  A)
  Chromosomes done clear
  B)
  Gene done clear
  C)
  Gametes done clear
  D)
  Gametocytes done clear
  View Solution play_arrow

• question_answer74)
  The twenty third pair of chromosomes in man is known as [MP PMT 2002]
  A)
  Chromatid done clear
  B)
  Heterosome done clear
  C)
  Autosome done clear
  D)
  Gene done clear
  View Solution play_arrow

• question_answer75)
  In recent past human chromosomes have been studied by a technique using specific, often fluorescent dyes, known as [MP PMT 2002]
  A)
  Dyeing technique done clear
  B)
  Banding technique done clear
  C)
  Ultra dyeing technique done clear
  D)
  Karyotyping technique done clear
  View Solution play_arrow

• question_answer76)
  The chromosomes as thread like structures in nucleus was first described by [MP PMT 2002]
  A)
  Mendel done clear
  B)
  Strasburger done clear
  C)
  Darwin done clear
  D)
  Levitzky done clear
  View Solution play_arrow

• question_answer77)
  The function of chromosomes of carrying the genetic information from one cell generation to another is performed by [MP PMT 2002]
  A)
  RNA done clear
  B)
  DNA done clear
  C)
  Histones done clear
  D)
  Calcium done clear
  View Solution play_arrow

• question_answer78)
  The chromosomes which determine the somatic characters are called [CMC Vellore 1979; MH CET 2002]
  A)
  Sex chromosomes done clear
  B)
  Heterosomes done clear
  C)
  Autosomes done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer79)
  The linkage map of X-chromosome of fruit fly has 66 units with yellow body gene (y) at one end and bobbed hair (b) gene at the other end. The recombination frequency between these two genes (y and b) should be [CBSE PMT 2003]
  A)
  100 % done clear
  B)
  66 % done clear
  C)
  50 % done clear
  D)
  5.50 % done clear
  View Solution play_arrow

• question_answer80)
  Chromosome number is  [MP PMT 2003]
  A)
  Fixed for a species done clear
  B)
  Fixed for an ecosystem done clear
  C)
  Fixed for a community done clear
  D)
  Fixed for a biosphere done clear
  View Solution play_arrow

• question_answer81)
  Science which links heredity with environments is [MP PMT 2004]
  A)
  Genetics done clear
  B)
  Gene ecology done clear
  C)
  Ecology done clear
  D)
  Ecophysiology done clear
  View Solution play_arrow

• question_answer82)
  In man sexlinked characters are mainly transmitted through  [MP PMT 2004]
  A)
  Y-chromosome done clear
  B)
  Autosomes done clear
  C)
  X-chromosome done clear
  D)
  X-chromosome, Y-chromosome and Autosomes done clear
  View Solution play_arrow

• question_answer83)
  A male human is heterozygous for autosomal genes A and B and is also hemizygous for hemophilic gene h. What proportion of his sperms will be abh [CBSE PMT 2004]
  A)
  \[\frac{1}{16}\] done clear
  B)
  \[\frac{1}{4}\] done clear
  C)
  \[\frac{1}{8}\] done clear
  D)
  \[\frac{1}{32}\] done clear
  View Solution play_arrow

• question_answer84)
  The recessive genes located on X-chromosome in humans are always   [CBSE PMT 2004]
  A)
  Expressed in males done clear
  B)
  Expressed in females done clear
  C)
  Lethal done clear
  D)
  Sub-lethal done clear
  View Solution play_arrow

• question_answer85)
  The total number of nitrogenous bases in human genome is estimated to be about  [AIIMS 2004]
  A)
  3.5 million done clear
  B)
  35 thousand done clear
  C)
  35 million done clear
  D)
  3.1 billion done clear
  View Solution play_arrow

• question_answer86)
  In order to calculate map distance of genes on a chromosome, one must know the [AIEEE 2004]
  A)
  Number of mutant genes done clear
  B)
  Cross over percentage done clear
  C)
  Recombination frequency of each gene locus done clear
  D)
  Non-cross over percentage done clear
  View Solution play_arrow

• question_answer87)
  At a particular locus, frequency of 'A' allele is 0.6 and that of 'a' is 0.4. What would be the frequency of heterozygotes in a random mating population of equilibrium [CBSE PMT 2005]
  A)
  0.16 done clear
  B)
  0.48 done clear
  C)
  0.36 done clear
  D)
  0.24 done clear
  View Solution play_arrow

• question_answer88)
  Centromere is required for [CBSE PMT 2005]
  A)
  Transcription done clear
  B)
  Crossing over done clear
  C)
  Cytoplasmic cleavage done clear
  D)
  Movement of chromosomes towards poles done clear
  View Solution play_arrow

• question_answer89)
  Telomerase is an enzyme which is a [CBSE PMT 2005]
  A)
  Repetitive DNA done clear
  B)
  RNA done clear
  C)
  Simple protein done clear
  D)
  Ribonucleoprotein done clear
  View Solution play_arrow

• question_answer90)
  Percentage of recombination between A and B is 9% and C is 17%, B and C is 26%, then the arrangement of genes is [Orissa JEE 2004]
  A)
  ABC done clear
  B)
  ACB done clear
  C)
  BCA done clear
  D)
  BAC. done clear
  View Solution play_arrow

• question_answer91)
  Chromosome complement with 2n-1 is called as  [BHU 2005]
  A)
  Monosomy done clear
  B)
  Nullosomy done clear
  C)
  Trisomy done clear
  D)
  Tetrasomy done clear
  View Solution play_arrow

• question_answer92)
  A gene is said to be dominant, if [CBSE PMT 1992, 2002]
  A)
  It is never expressed in any condition done clear
  B)
  It is expressed only in heterozygous condition done clear
  C)
  It expresses its effect only in homozygous stage done clear
  D)
  It is expressed both in homozygous and heterozygous conditions done clear
  View Solution play_arrow

• question_answer93)
  Chromosomes were seen first time by [RPMT 2003]
  A)
  Waldeyer done clear
  B)
  Flemming done clear
  C)
  Hofmeister done clear
  D)
  Strasburger done clear
  View Solution play_arrow

• question_answer94)
  Genes located at the same locus of chromosomes are called[CBSE PMT 1997]
  A)
  Polygenes done clear
  B)
  Oncogenes done clear
  C)
  Multiple alleles done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer95)
  Jumping genes are found in [MP PMT 2003]
  A)
  Eukaryotes done clear
  B)
  Bacteriophage done clear
  C)
  Bacteria done clear
  D)
  Eukaryotes and prokaryotes done clear
  View Solution play_arrow

• question_answer96)
  An auxotroph is [DPMT 1982; CMC Vellore 1994]
  A)
  A plant that responds by bending towards the sun done clear
  B)
  A plant that is able to synthesize its own carbohydrates done clear
  C)
  Mutant which has lost its ability to synthesize one or more essential compounds done clear
  D)
  An organism that depends on another organism for meeting its nutritional requirements done clear
  View Solution play_arrow

• question_answer97)
  The person who discovered 'Y' chromosomes was
  A)
  Mc Carthy done clear
  B)
  Mc Clung done clear
  C)
  Gregor Mendel done clear
  D)
  Netti Stevens done clear
  View Solution play_arrow

• question_answer98)
  "Nu body'' was shown by [BVP 2003]
  A)
  Darlington done clear
  B)
  Johanssen done clear
  C)
  Woodcock done clear
  D)
  Temin and Baltimore done clear
  View Solution play_arrow

• question_answer99)
  "Cytochimeras'' means
  A)
  Cells having haploid number of chromosomes done clear
  B)
  Cells having two nuclei done clear
  C)
  Cells having different chromosomes than other vegetative cells done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer100)
  Pleotropic character represent that quality of gene which is called [DPMT 1980]
  A)
  Being dominant over recessive genes done clear
  B)
  Being capable of representing more than one form done clear
  C)
  Regulate more than one phenotype characters done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer101)
  In Pisum sativum there are 14 chromosomes. How pairs with different chromosomal composition may can be prepared [BHU 2005]
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer102)
  When one or more genes are missing from middle part of chromosome, it is called
  A)
  Middle loss done clear
  B)
  Partial loss done clear
  C)
  Intercalary deficiency done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer103)
  Gene controls [MP PMT 1989]
  A)
  Heredity but not protein synthesis done clear
  B)
  Protein synthesis but not heredity done clear
  C)
  Both heredity and protein synthesis done clear
  D)
  Biochemical action of some enzymes done clear
  View Solution play_arrow

• question_answer104)
  Smallest structure having the power of replicating itself is [CPMT 1978]
  A)
  Chloroplast done clear
  B)
  Gene done clear
  C)
  Mitochondria done clear
  D)
  Ribosome done clear
  View Solution play_arrow

• question_answer105)
  The core of nucleosome is made up of [AFMC 2000]
  A)
  \[{{H}_{1}},{{H}_{2}}A,{{H}_{2}}B,{{H}_{3}}\] done clear
  B)
  \[{{H}_{1}},{{H}_{2}}A,{{H}_{2}}B,{{H}_{4}}\] done clear
  C)
  \[{{H}_{1}},{{H}_{2}}A,{{H}_{2}}B,{{H}_{3}},{{H}_{4}}\] done clear
  D)
  \[{{H}_{2}}A,{{H}_{2}}B,{{H}_{3}},{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer106)
  Nucleosome consists of [MP PMT 1999]
  A)
  Nucleolus done clear
  B)
  Genes done clear
  C)
  Microfilaments done clear
  D)
  Histones done clear
  View Solution play_arrow

• question_answer107)
  Diameter of each nucleosome is about
  A)
  \[50\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  B)
  \[110\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  C)
  \[200\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  D)
  \[400\overset{\text{o}}{\mathop{\text{A}}}\,\] done clear
  View Solution play_arrow

• question_answer108)
  In between two nucleosomes, how many nucleotide pairs are present
  A)
  5 to 15 done clear
  B)
  15 to 100 done clear
  C)
  100 to 200 done clear
  D)
  200 to 400 done clear
  View Solution play_arrow

• question_answer109)
  Nucleosomes are [BHU 1985; MP PMT 2003]
  A)
  Units of DNA done clear
  B)
  Units of RNA done clear
  C)
  Units of proteins done clear
  D)
  Units of chromosomes done clear
  View Solution play_arrow

• question_answer110)
  Morgan was awarded Nobel Prize for
  A)
  Gene theory done clear
  B)
  Nuclear theory done clear
  C)
  DNA theory done clear
  D)
  Cytoplasmic inheritance done clear
  View Solution play_arrow

• question_answer111)
  Satellite DNA is present in
  A)
  Nucleus done clear
  B)
  Chloroplast done clear
  C)
  Nucleolus done clear
  D)
  Chromosomes done clear
  View Solution play_arrow

• question_answer112)
  Holandric genes are [DPMT 1993; BHU 2000]
  A)
  Carried by 'X' chromosomes done clear
  B)
  Carried by different parts of 'Y' chromosomes done clear
  C)
  Carried by 'X' and 'Y' chromosomes done clear
  D)
  Carried by autosomes done clear
  View Solution play_arrow

• question_answer113)
  Who invented the method of identification of nutrient characters in Neurospora crassa [BHU 1985]
  A)
  Averbach and Robinson done clear
  B)
  Beadle and Tatum done clear
  C)
  Bateson and Punnet done clear
  D)
  Luria and Dulecco done clear
  View Solution play_arrow

• question_answer114)
  What are allosomes [BHU 1986]
  A)
  Granular structures on chromosomes done clear
  B)
  Node like structures on chromosomes done clear
  C)
  Sex chromosomes done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer115)
  In which bacteria insulin gene was cloned
  A)
  Klebsiella done clear
  B)
  E. coli done clear
  C)
  Shigella done clear
  D)
  Clostridium done clear
  View Solution play_arrow

• question_answer116)
  Separation of the two chromatids of a chromosome takes place in mitosis during [CPMT 1975, 81; DPMT 1993]
  A)
  Prophase done clear
  B)
  Anaphase done clear
  C)
  Metaphase done clear
  D)
  Telophase done clear
  View Solution play_arrow

• question_answer117)
  The modern concept of gene is [DPMT 1985; CPMT 1994]
  A)
  A segment of DNA capable of crossing over done clear
  B)
  A functional unit of DNA done clear
  C)
  A segment of DNA done clear
  D)
  A segment of chromosome done clear
  View Solution play_arrow

• question_answer118)
  "One gene one enzyme'' theory was proposed by [BHU 1982, 84, 95; CPMT 1994; MP PMT 1996, 03; DPMT 2004; BVP 2004]
  A)
  G.W. Beadle and E.L. Tatum done clear
  B)
  O.T. Avery and M. McCarthy done clear
  C)
  J.H. Tijo and A. Levan done clear
  D)
  C.E. Ford and J.H. Tijo done clear
  View Solution play_arrow

• question_answer119)
  One functional unit of gene which specifies synthesis of one polypeptide is known as [DPMT 1985; BHU 1991; MP PMT 2001]
  A)
  Recon done clear
  B)
  Clone done clear
  C)
  Codon done clear
  D)
  Cistron done clear
  View Solution play_arrow

• question_answer120)
  Genes are chemically [NCERT 1983; CPMT 1983; DPMT 1991; BHU 2002]
  A)
  Polynucleotide done clear
  B)
  Histones done clear
  C)
  Lipoproteins done clear
  D)
  Hydrocarbons done clear
  View Solution play_arrow

• question_answer121)
  The terms cistron, recon and muton were proposed by [DPMT 1987]
  A)
  W. Ingram done clear
  B)
  Bateson done clear
  C)
  J. Lederberg done clear
  D)
  S. Benzer done clear
  View Solution play_arrow

• question_answer122)
  An inherited factor that determines a biological characteristic of an organism is called [DPMT 1991]
  A)
  Gene done clear
  B)
  Chromosome done clear
  C)
  Allele done clear
  D)
  Chromatid done clear
  View Solution play_arrow

• question_answer123)
  Genes are [MP PMT 2005]
  A)
  Morphological units done clear
  B)
  Hereditary units done clear
  C)
  Functional units done clear
  D)
  All units done clear
  View Solution play_arrow

• question_answer124)
  The eukaryotic chromosomes are made up of  [MP PMT 1994]
  A)
  DNA done clear
  B)
  RNA done clear
  C)
  DNA and proteins done clear
  D)
  DNA and lipids done clear
  View Solution play_arrow

• question_answer125)
  A characteristic showing continuous variation is controlled by a
  A)
  Dominant gene done clear
  B)
  Recessive gene done clear
  C)
  Mutant gene done clear
  D)
  Number of genes done clear
  View Solution play_arrow

• question_answer126)
  A pure breeding pea plant with the dominant phenotype of character A and recessive phenotype of character B was crossed with another pure breeding plant with the recessive phenotype of A and dominant phenotype of character B. A offspring of this cross was crossed with a homozygous recessive for both the characters - A and B. The following results are obtained 22 were phenotypically dominant for A and recessive for B. 4 were phenotypically dominant for both A and B. 4 were phenotypically recessive for both A and B. 24 were phenotypically recessive for A and dominant for B. These results show that
  A)
  Genes A and B are linked done clear
  B)
  Independent segregation of genes A and B done clear
  C)
  Mendelian dihybrid inheritance done clear
  D)
  Polygenic inheritance done clear
  View Solution play_arrow

• question_answer127)
  Genes which are located on the same chromosome are
  A)
  Allelic to each other done clear
  B)
  Codominant done clear
  C)
  Linked to each other done clear
  D)
  Mutant genes done clear
  View Solution play_arrow

• question_answer128)
  In split genes, the coding sequences are called [CBSE PMT 1995]
  A)
  Cistrons done clear
  B)
  Operons done clear
  C)
  Exons done clear
  D)
  Introns done clear
  View Solution play_arrow

• question_answer129)
  Which one of the following true [MP PMT 2005]
  A)
  One gene one protein done clear
  B)
  One gene one polypeptide done clear
  C)
  One gene many polypeptide done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer130)
  The bacterial genome refers to the total number of genes located upon a or The term 'genome' refers to the total number of genes combined in a [AIIMS 1994; Manipal 1995; MP PMT 1995, 98]
  A)
  Haploid set of chromosomes done clear
  B)
  Diploid set of chromosomes done clear
  C)
  Tetraploid set of chromosomes done clear
  D)
  Hexaploid set of chromosomes done clear
  View Solution play_arrow

• question_answer131)
  Different types of chromosomes can be recognised by the position of the following separating the two arms [KCET 1994]
  A)
  Centromere done clear
  B)
  Genes done clear
  C)
  Spindle done clear
  D)
  Nucleus done clear
  View Solution play_arrow

• question_answer132)
  One gene one enzyme concept means [CPMT 1995]
  A)
  One gene controls one enzyme done clear
  B)
  All the enzymes are controlled by genes done clear
  C)
  All the genes are controlled by enzymes done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer133)
  A gene is made up of [MP PMT 1996; BVP 2002]
  A)
  DNA done clear
  B)
  RNA done clear
  C)
  Either DNA or RNA done clear
  D)
  Amino acids done clear
  View Solution play_arrow

• question_answer134)
  The theory of jumping genes was propounded by or Noble prize for the concept of jumping gene was give [MHCET 2001; BVP 2001, 03, 04; MP PMT 2002; CPMT 2003]
  A)
  Mendel done clear
  B)
  Morgan done clear
  C)
  Barbara Mc Clintock done clear
  D)
  Sanger done clear
  View Solution play_arrow

• question_answer135)
  The term 'gene' was coined by [CPMT 1973; MH-CET 2004]
  A)
  Mendel done clear
  B)
  Johannsen done clear
  C)
  Khorana done clear
  D)
  Kornberg done clear
  View Solution play_arrow

• question_answer136)
  A discrete multiprotein structure on the chromosome which contains enzymes  for DNA duplication is called as
  A)
  Replicon done clear
  B)
  Resolvase done clear
  C)
  Replisome done clear
  D)
  Replicative form done clear
  View Solution play_arrow

• question_answer137)
  Substances known as 'heredity carriers' are
  A)
  Ribosomes done clear
  B)
  Genes done clear
  C)
  Enzymes done clear
  D)
  Hormones done clear
  View Solution play_arrow

• question_answer138)
  The genes are in the form of  [CPMT 1998]
  A)
  Sequence of nucleotide done clear
  B)
  Base pair done clear
  C)
  Proportion of base pair done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer139)
  Genetically active area of chromosome is called [BVP 2000]
  A)
  Euchromatin done clear
  B)
  Heterochroatin done clear
  C)
  Heptan done clear
  D)
  Cistron done clear
  View Solution play_arrow

• question_answer140)
  Who postulated the 'Chromosome Theory of Inheritance' [MP PMT 1997]
  A)
  De Vries done clear
  B)
  Mendel done clear
  C)
  Sutton and Boveri done clear
  D)
  Morgan done clear
  View Solution play_arrow

• question_answer141)
  Which one of the following histone is not present in the core particle of nucleosome
  A)
  \[{{H}_{1}}\] done clear
  B)
  \[{{H}_{2}}\] done clear
  C)
  \[{{H}_{3}}\] done clear
  D)
  \[{{H}_{4}}\] done clear
  View Solution play_arrow

• question_answer142)
  Octamer which form complex unit with DNA is called
  A)
  Nucleosome done clear
  B)
  Centrosome done clear
  C)
  Chromosome done clear
  D)
  Endosome done clear
  View Solution play_arrow

• question_answer143)
  Nucleosomes are bounded by [BHU 1986]
  A)
  RNA done clear
  B)
  Histone\[{{H}_{4}}\] done clear
  C)
  Histone\[{{H}_{3}}\] done clear
  D)
  DNA done clear
  View Solution play_arrow

• question_answer144)
  Core particle of nucleosome is composed of how many histones
  A)
  Four done clear
  B)
  Five done clear
  C)
  Six done clear
  D)
  Eight done clear
  View Solution play_arrow

• question_answer145)
  A normal spontaneous rate for a single gene is one mutation in every replication [Orissa JEE 2004]
  A)
  \[{{10}^{3}}\]to\[{{10}^{5}}\] done clear
  B)
  \[{{10}^{5}}\]to\[{{10}^{7}}\] done clear
  C)
  \[{{10}^{6}}\] to\[{{10}^{9}}\] done clear
  D)
  \[{{10}^{7}}\]to\[{{10}^{10}}\] done clear
  View Solution play_arrow

• question_answer146)
  Balbiani rings are found in  [KCET 2004]
  A)
  All chromosomes done clear
  B)
  Lampbrush chromosome done clear
  C)
  Dicot stems done clear
  D)
  Polytene chromosome done clear
  View Solution play_arrow

• question_answer147)
  Which organism was used by Beadle and Tatum to proposed one gene-one enzyme hypothesis [CPMT 2004]
  A)
  E.coli done clear
  B)
  Nostoc done clear
  C)
  Drosophila done clear
  D)
  Neurospora done clear
  View Solution play_arrow

• question_answer148)
  Beadle and E.L. Tatum performed classical experiment on Neurospora crassa to explain [BVP 2004]
  A)
  One gene produce one enzyme done clear
  B)
  One enzyme can correct one gene done clear
  C)
  Both (a) and (b) done clear
  D)
    None of these done clear
  View Solution play_arrow

• question_answer149)
  Carrier of hereditary is [MP PMT 2005]
  A)
  Gene done clear
  B)
  DNA done clear
  C)
  Chromosome done clear
  D)
  All of above done clear
  View Solution play_arrow

• question_answer150)
  The salivary gland chromosomes in the dipteran larvae, are useful in gene mapping because [CBSE PMT 2005]
  A)
  These are fused done clear
  B)
  These are much longer in size done clear
  C)
  These are easy to stain done clear
  D)
  They have endoreduplicated chromosomes done clear
  View Solution play_arrow

• question_answer151)
  Which of the following is incorrectly paired [Kerala CET 2005]
  A)
  Sry-gene-X-chromosome done clear
  B)
  2n-2-nullisomic done clear
  C)
  Nucleoid prokaryote done clear
  D)
  Polytene chromosome-Drosophila done clear
  E)
  Trisomy-Down?s syndrome done clear
  View Solution play_arrow

• question_answer152)
  Polytene chromosomes are formed by [CPMT 2005]
  A)
  Endoreduplication of chromosomes done clear
  B)
  Somatic pairing of homologous chromosomes done clear
  C)
  Somatic pairing of non-homologous chromosomes done clear
  D)
  Germinal pairing of non-homologous chromosomes done clear
  View Solution play_arrow

• question_answer153)
  Few genes are found in all types cells of differentiated multicellular organisms of high class. It is called [AMU 2005]
  A)
  Key genes done clear
  B)
  Core genes done clear
  C)
  Housekeeping genes done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer154)
  How many types of histone proteins take part in the composition of chromosome
  A)
  Two done clear
  B)
  Three done clear
  C)
  Four done clear
  D)
  Five done clear
  View Solution play_arrow

• question_answer155)
  In the construction of chromosome maps, the evidence is derived mainly from
  A)
  Cross over values done clear
  B)
  Hereditary effects of chromosome fragmentation done clear
  C)
  Electron microscopy done clear
  D)
  Behaviour of chromosomes during meiosis done clear
  View Solution play_arrow

• question_answer156)
  A genome is a set of chromosome corresponding to it [CPMT 1994]
  A)
  Haploid set of a species done clear
  B)
  Diploid set of a species done clear
  C)
  Triploid set of a species done clear
  D)
  Polyploid set of a species done clear
  View Solution play_arrow

• question_answer157)
  DNA elements, which can switch their position, are called [CBSE PMT 1998; MP PMT 2004]
  A)
  Exons done clear
  B)
  Introns done clear
  C)
  Cistrons done clear
  D)
  Transposons/Jumping genes done clear
  View Solution play_arrow

• question_answer158)
  The human chromosomes are divided into 7 groups, B-chromosomes are
  A)
  6-12 done clear
  B)
  1-2 done clear
  C)
  13-15 done clear
  D)
  4-5 done clear
  View Solution play_arrow

• question_answer159)
  The polytene chromosomes were discovered for the first time in [CBSE PMT 1995]
  A)
  Chironomus done clear
  B)
  Fruitfly done clear
  C)
  Drosophila done clear
  D)
  House fly done clear
  View Solution play_arrow

• question_answer160)
  What is the chromosome number of plasmodium [RPMT 2000]
  A)
  18 done clear
  B)
  14 done clear
  C)
  10 done clear
  D)
  9 done clear
  View Solution play_arrow

• question_answer161)
  The genes, which are confined to differential region of Y chromosome only, are called       [AIIMS 1998; MP PMT 2000; CBSE PMT 1994; CPMT 2003]
  A)
  Mutant done clear
  B)
  Autosomal done clear
  C)
  Holandric done clear
  D)
  Completely sex-linked done clear
  View Solution play_arrow