Principles Of Inheritance And Variation — DPP 8

20 NEET questions from Principles Of Inheritance And Variation, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

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1
A diseased man marries a normal woman. They get three daughters and five sons. All the daughters were diseased and sons were normal. The gene of this disease is :-
  1. A Sex linked dominant
  2. B Sex linked recessive
  3. C Sex limited character
  4. D Autosomal dominant
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Correct answer: A

2
Genes controlling seven traits in pea studied by Mendel were actually located on:-
  1. A Seven chromosomes
  2. B Six chromosomes
  3. C Four chromosomes
  4. D Five chromosomes
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Correct answer: C

3
In case of incomplete dominance the $\mathrm { F } _ { 2 }$ phenotypic ratio in monohybrid cross will be:-
  1. A $1 : 2 : 1$
  2. B $3 : 1 : 1$
  3. C $9 : 3 : 3 : 1$
  4. D $2 : 3 : 1$
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Correct answer: A

4
Presence of recombinants is due to :-
  1. A crossing over
  2. B linkage
  3. C lack of independent assortment
  4. D All of the above
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Correct answer: A

5
Which chromosome set is found in male grasshopper :-
  1. A $2 \mathrm {~A} + \mathrm { XY }$
  2. B $2 \mathrm {~A} + \mathrm { XO }$
  3. C $2 \mathrm {~A} + \mathrm { YY }$
  4. D $2 \mathrm {~A} + \mathrm { XX }$
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Correct answer: B

6
Male heterogamy found in case of :-
  1. A XO type male in Grasshopper
  2. B XY type male in human
  3. C ZW male in birds
  4. D Both (A) and (B)
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Correct answer: D

7
In which of the following sex is determined by female individual :-
  1. A Human
  2. B Drosophila
  3. C Birds
  4. D Grasshopper
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Correct answer: C

8
The recessive genes located on X-chromosome in humans are always :-
  1. A Expressed in females
  2. B Lethal
  3. C Sub-lethal
  4. D Expressed in males
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Correct answer: D

9
A child of O blood group, has B-blood group father, the genotype of father would be :-
  1. A $\mathrm{I ^ { 0 }}$ $\mathrm{I ^ { 0 }}$
  2. B $\mathrm{I ^ { B }}$ $\mathrm{I ^ { B }}$
  3. C $\mathrm{I ^ { A }}$ $\mathrm{I ^ { B }}$
  4. D $\mathrm{I ^ { B }}$ $\mathrm{I ^ { 0 }}$
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Correct answer: D

10
Sickle cell anaemia is the result of $\_\_\_\_$ mutation in the haemoglobin gene :-
  1. A frame shift
  2. B deletion
  3. C point
  4. D none of the above
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Correct answer: C

11
How many linkage group are there in bacteria E.coli ?
  1. A One
  2. B Two
  3. C Four
  4. D None
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Correct answer: A

12
Which of the following is responsible for sex determination in chicks fowls :-
  1. A Sperm
  2. B Egg
  3. C Somatic cell
  4. D Every cell of body
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Correct answer: B

13
Which statement is not true for Drosophila melanogaster :-
  1. A They complete their life cycle about two weeks.
  2. B Single mating produce large number of progeny flies.
  3. C It has few hereditary variations that can be seen with high power microscope.
  4. D It has clear differentiation of the sex.
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Correct answer: C

14
In male grass hoppers and moths there are two pairs of autosomes and :-
  1. A X only
  2. B X and Y
  3. C Y only
  4. D none of these
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Correct answer: A

15
In case of incomplete dominance, $\mathrm{F _ { 2 }}$ generation has:-
  1. A Genotypic ratio equal to phenotypic ratio
  2. B Genotypic ratio is $3 : 1$
  3. C Phenotypic ratio is $3 : 1$
  4. D None of these
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Correct answer: A

16
Which of the following show linkage group in coupling phase :-
Principles Of Inheritance And Variation – NEET-4736
  1. A
  2. B
  3. C
  4. D
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Correct answer: A

17
Linked gene shows :-
  1. A Always non-parental combinations
  2. B Sometimes new combinations
  3. C Always new combinations
  4. D New combinations more
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Correct answer: B

18
Frequency of crossing over will be relatively more if :-
  1. A distance between the two genes is less
  2. B distance between the two genes is more
  3. C linked genes are more
  4. D Both (B) and (C)
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Correct answer: B

19
Mammary glands in female, moustaches and beard in human males are examples of
  1. A Sex linked traits
  2. B Sex limited traits
  3. C Sex differentiating traits
  4. D Sex-determining traits
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Correct answer: B

20
Experimental verification of the chromosomal theory of inheritance done by Thomas Hunt Morgan and his colleagues they worked with :-
  1. A Pea plant
  2. B Sweet pea plant
  3. C Snapdragon
  4. D Drosophila
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Correct answer: D

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