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question_answer1)
The \[{{F}_{2}}\] dihybirid ratio 9 : 3 : 4 is explained on the basis of [BHU 1988]
A)
Epistatic gene done
clear
B)
Supplementary gene done
clear
C)
Allelic interaction done
clear
D)
Complementary gene interaction done
clear
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question_answer2)
The phenomenon of incomplete dominance was observed by
A)
De Vries done
clear
B)
Correns done
clear
C)
Tschermak done
clear
D)
None of the above done
clear
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question_answer3)
What is the other name for "incomplete dominance''
A)
Blending inheritance done
clear
B)
Co-dominance done
clear
C)
Pseudo-dominance done
clear
D)
All the above done
clear
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question_answer4)
In poultry, new comb colour appears by colaboration of two dominant gene is
A)
Walnut done
clear
B)
Single done
clear
C)
Rose done
clear
D)
Pea done
clear
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question_answer5)
Lathyrus odoratus is an example of which of the following genes [CPMT 2000]
A)
Supplementary genes done
clear
B)
Complementary genes done
clear
C)
Lethal genes done
clear
D)
Codominant genes done
clear
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question_answer6)
The example of epistatic gene is shown by
A)
Comb colour of poult done
clear
B)
Sweet pea done
clear
C)
Cucurbitta pepo done
clear
D)
None of the above done
clear
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question_answer7)
Dominant epistasis is shown by
A)
Antirrhinum majus done
clear
B)
Lathyrus odoratus done
clear
C)
Mirabilis jalapa done
clear
D)
None of the above done
clear
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question_answer8)
Which is the example of supplementary gene
A)
Cucurbitta pepo done
clear
B)
Skin colour of mice done
clear
C)
Comb shape of poults done
clear
D)
None of the above done
clear
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question_answer9)
Colour of endosperm in maize is an example of
A)
Duplicate genes done
clear
B)
Inhibitory genes done
clear
C)
Polymeric genes done
clear
D)
Quantitative inheritance done
clear
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question_answer10)
In \[{{F}_{2}}\] generation of monohybrid cross the cause of 1 : 2 : 1 phenotypic ratio is [Pb. PMT 2004]
A)
Epistatics done
clear
B)
Inhibition done
clear
C)
Quantitative inheritance done
clear
D)
Incomplete dominance done
clear
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question_answer11)
Which is the example of inhibitory gene
A)
Rice done
clear
B)
Pea done
clear
C)
Sweet pea done
clear
D)
All the above done
clear
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question_answer12)
Lethal genes are
A)
Dominant homozygous done
clear
B)
Recessive done
clear
C)
Dominant heterozygous done
clear
D)
Codominant done
clear
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question_answer13)
The fruit shape in tomato is an example of
A)
Complementary gene done
clear
B)
Supplementary genes done
clear
C)
Polygenic inheritance done
clear
D)
Duplicate genes done
clear
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question_answer14)
In shorthorn cattle genes for red \[({{r}_{1}}),\] and white \[({{r}_{2}})\] coat colour occur. Crosses between red \[({{r}_{1}}{{r}_{2}})\] and white \[({{r}_{2}}{{r}_{2}})\] produced \[({{r}_{1}}{{r}_{2}})\] roan. This is an example of [BHU 2003]
A)
Complementary genes done
clear
B)
Epistasis done
clear
C)
Codominance done
clear
D)
Incomplete dominance done
clear
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question_answer15)
Genes that are similar in phenotypic effect when present separately, but together interact to produce a different trait and ratio is 9 : 7 in \[{{F}_{2}}\] generation. What are such genes known as [DPMT 1980]
A)
Supplementary genes done
clear
B)
Complementary genes done
clear
C)
Hypostatic genes done
clear
D)
Epistatic genes done
clear
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question_answer16)
The phenomenon in which an allele of one gene suppresses the activity of an allele of another gene is known as [CBSE PMT 1995]
A)
Dominance done
clear
B)
Inactivation done
clear
C)
Epistasis done
clear
D)
Suppression done
clear
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question_answer17)
In Mirabilis jalapa, when homozygous red-flowered and white-flowered plants are crossed, all \[{{F}_{1}}\] plants have pink-coloured flowers. In \[{{F}_{2}}\] produced by selfing of \[{{F}_{1}}\] individuals, red, pink and white flowered plants appear respectively in the ratio of or What will be the ratio in \[{{F}_{2}}\] generation if red-flowered variety of Mirabilis jalapa is crossed with white-flowered variety [MP PMT 1995, 98, 99; BHU 2003]
A)
1 : 1 : 1 : 1 done
clear
B)
1 : 2 : 1 done
clear
C)
2 : 1 done
clear
D)
3 : 1 done
clear
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question_answer18)
What would be the colour of flowers in \[{{F}_{1}}\] progeny as a result of a cross between homozygous red and homozygous white-flowered Snapdragon [MP PMT 1997]
A)
Red done
clear
B)
White done
clear
C)
Red and white done
clear
D)
Pink done
clear
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question_answer19)
9 : 3 : 3 : 1 ratio is modified to 9 : 7 ratio due to [CPMT 1998; CBSE PMT 2001]
A)
Complementry gene done
clear
B)
Epistatic gene done
clear
C)
Hypostatic gene done
clear
D)
Supplementry gene done
clear
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question_answer20)
Incomplete dominance is found in [MP PMT 2001]
A)
Pisum sativum done
clear
B)
Antirrhinum majus done
clear
C)
Both (a) and (b) done
clear
D)
None of these done
clear
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question_answer21)
Complete dominance is absent in [JIPMER 2002]
A)
Pisum sativum done
clear
B)
Mirabilis jalapa done
clear
C)
Lathyrus odoratus done
clear
D)
Oenothera lamarckiana done
clear
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question_answer22)
When an albino female plant of maizeis crossed with normal green male plant, all plants in the progeny are albino because [CBSE PMT 1989; CMC Vellore 1994]
A)
Plastids are inherited through maternal plants done
clear
B)
Albinism is dominant over green character done
clear
C)
The crossing results in structural changes in green plastids done
clear
D)
Green plastids of male parents become mutated done
clear
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question_answer23)
Kappa particles indicate [MP PMT 1987, 2003]
A)
Nuclear inheritance done
clear
B)
Cytoplasmic inheritance done
clear
C)
Mutation done
clear
D)
Nucleo-cytoplasmic inheritance done
clear
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question_answer24)
Mirabilis jalapa is a good example of [AIIMS 2001]
A)
Complete dominance done
clear
B)
Plastid inheritance done
clear
C)
Both (a) and (b)s done
clear
D)
None of the above done
clear
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question_answer25)
Cytoplasmic male sterility in maize is manifestation of interaction between [CMC Vellore 1994]
A)
Chloroplast and nuclear genes done
clear
B)
Mitochondrial and nuclear genes done
clear
C)
Chloroplast and mitochondrial genes done
clear
D)
Cytoplasmic factors and male sterile genes done
clear
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question_answer26)
The two organelles responsible for cytoplasmic inheritance among eukaryotes are [MP PMT 1993]
A)
Lysosomes and mitochondria done
clear
B)
Mitochondria and golgi complex done
clear
C)
Chloroplasts and mitochondria done
clear
D)
Chloroplasts and lysosomes done
clear
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question_answer27)
After crossing two plants, the progenies are found to be male sterile. The phenomenon is found to be maternally inherited and is due to some genes which reside in [CBSE PMT 1997; Pb. PMT 2000]
A)
Nucleus done
clear
B)
Chloroplast done
clear
C)
Mitochondria done
clear
D)
Cytoplasm done
clear
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question_answer28)
Incomplete dominance is shown by [MHCET 2004]
A)
Primrose done
clear
B)
Mirabilis done
clear
C)
Helianthus done
clear
D)
China rose done
clear
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question_answer29)
\[{{F}_{1}}\] hybrid is intermediate between the two parents. The phenomenon is [MHCET 2004]
A)
Codominance done
clear
B)
Dominace done
clear
C)
Blending inheritance done
clear
D)
Incomplete dominance done
clear
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question_answer30)
Extranuclear inheritance is a consequence of presence of genes in [CBSE PMT 2004]
A)
Ribosomes and chloroplasts done
clear
B)
Lysosomes and ribosomes done
clear
C)
Mitochondria and chloroplasts done
clear
D)
Endoplasmic reticulum and mitochondria done
clear
View Solution play_arrow
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question_answer31)
Genes for cytoplasmic male sterility in plants are generally located in [CBSE PMT 2005]
A)
Mitochondrial genome done
clear
B)
Cytosol done
clear
C)
Chloroplast genome done
clear
D)
Nuclear genome done
clear
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question_answer32)
Now a days which of the following are known as "magic circles"
A)
Plasmids done
clear
B)
Genes done
clear
C)
Amyloplasts done
clear
D)
Elaioplasts done
clear
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question_answer33)
A plasmid [MP PMT 1999]
A)
Lives together with chromosome done
clear
B)
Shows dependent assortment done
clear
C)
Can replicate independently done
clear
D)
Cannot replicate done
clear
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question_answer34)
Hereditary element may be attached to chromosome or found free in cytoplasm is called
A)
Microsome done
clear
B)
Diosome done
clear
C)
Peroxisome done
clear
D)
Episome done
clear
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question_answer35)
Plasmids so found in bacteria are [MP PMT 2003]
A)
Extra nuclear DNA done
clear
B)
Food particles done
clear
C)
Dead protoplasmic parts done
clear
D)
None of the above done
clear
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question_answer36)
Plasmids are composed of
A)
Folded RNA molecules done
clear
B)
Single stranded DNA done
clear
C)
Circular double stranded DNA done
clear
D)
None of the above done
clear
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question_answer37)
Genes which confer antibiotic resistance on bacteria are located on [MP PMT 1995]
A)
Chromosomal DNA done
clear
B)
Plasmid done
clear
C)
RNA done
clear
D)
Polysome done
clear
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question_answer38)
Episome is a
A)
Plasmid done
clear
B)
Part of a chromosome done
clear
C)
Lysosome done
clear
D)
Ribosome done
clear
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question_answer39)
Which of the following is associated with multiple phenotypes [CPMT 1999;AIIMS 2000; JIPMER 2001; AFMC 2001]
A)
Epistasis done
clear
B)
Pleiotropy done
clear
C)
Polygenic inheritance done
clear
D)
Mutation done
clear
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question_answer40)
A cross involving two different genera is called
A)
Monohybrid cross done
clear
B)
Interspecific cross done
clear
C)
Intergeneric cross done
clear
D)
None of the above done
clear
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question_answer41)
It is easier to study polygenic inheritance of characters in plants than in animals because in the plants
A)
Matings can be controlled and large number of offsprings are obtained done
clear
B)
Matings cannot be controlled and large number of offsprings are produced done
clear
C)
Matings can be controlled and a small number of offsprings are produced done
clear
D)
Matings cannot be controlled and a small number of offsprings are produced done
clear
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question_answer42)
The phenotypic ratio obtained in quantitative inheritance of a dihybrid cross is [DPMT 2004]
A)
1 : 2 : 1 done
clear
B)
1 : 4 : 6 : 4 : 1 done
clear
C)
1 : 6 : 15 20 : 15 : 6 : 1 done
clear
D)
9 : 3 : 3 : 1 done
clear
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question_answer43)
The hybrid produced by cytoplasmic fusion is called
A)
A sexual hybrid done
clear
B)
Parasexual hybrid done
clear
C)
Somatic hybrid done
clear
D)
Protoplastic hybrid done
clear
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question_answer44)
The most likely reason for the development of resistance against pesticides in insects damaging a crop is [CBSE PMT 2004]
A)
Directed mutation done
clear
B)
Acquired heritable changes done
clear
C)
Random mutations done
clear
D)
Genetic recombination done
clear
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question_answer45)
Grain colour in wheat is determined by three pairs if polygenes. Following the cross AABBCC (dark colour) × aabbcc (light colour), in \[{{F}_{2}}\] generation what proportion of the progeny likely to resemble either parent [AIIMS 2005]
A)
None done
clear
B)
Less than 5 per cent done
clear
C)
One third done
clear
D)
Half done
clear
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