Principles Of Inheritance And Variation — DPP 3

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.

Attempt this test free 20 questions · 30 minutes · +80 marks
1
Crossing AABB & aabb, the probability of AaBb in $\mathrm { F } _ { 2 }$ generation would be :-
  1. A $1 / 16$
  2. B $2 / 16$
  3. C $8 / 16$
  4. D $4 / 16$
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Correct answer: D

2
According to Mendelism which character is showing dominance :-
  1. A Terminal position of flower
  2. B Green colour in seed
  3. C Wrinkled seeds
  4. D Green pod colour
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Correct answer: D

3
Which technique is used by Mendel for hybridisation :-
  1. A Emasculation
  2. B Bagging
  3. C Protoplast fusion
  4. D Both (A) and (B)
Show answer

Correct answer: D

4
The phenotypic ratio in a back cross between a trihybrid and homozygous recessive parent would be :-
  1. A $1 : 1$
  2. B $1 : 1 : 1 : 1$
  3. C $1 : 1 : 1 : 1 : 1 : 1$
  4. D $1 : 1 : 1 : 1 : 1 : 1 : 1 : 1$
Show answer

Correct answer: D

5
One of the following did not constitute the seven contrasting pairs of characters noticed by Mendel?
  1. A Height of the plants
  2. B Shape of the leaves
  3. C Shape of pod
  4. D Colour of pod
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Correct answer: B

6
Among the seven characters in pea plant, studied by Mendel, the number of characters related to flower, pod and seed respectively was:-
  1. A 2, 2, 2
  2. B 2, 2, 1
  3. C 1, 2, 2
  4. D 1, 1, 2
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Correct answer: A

7
A cross between pure tall pea plant with green pods and dwarf pea with yellow pods will produce how many tall $\mathrm{F _ { 2 }}$ plants, out of 16 ?
  1. A 15
  2. B 13
  3. C 12
  4. D 7
Show answer

Correct answer: C

8
When an $\mathrm{F _ { 1 }}$ individual is crossed with its either of the two parent. Then it is known as:-
  1. A Test cross
  2. B Back cross
  3. C Reciprocal cross
  4. D Monohybrid cross
Show answer

Correct answer: B

9
Genetic constitution of an individual is represented by :-
  1. A Genome
  2. B Genotype
  3. C Phenotype
  4. D Karyotype
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Correct answer: B

10
Mendel's Principle of segregation means that the gamete cells always receive :-
  1. A one pair of alleles
  2. B one quarter of the genes
  3. C one of the paired alleles
  4. D any pair of alleles
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Correct answer: C

11
How many gametes are produced in $F _ { 1 }$ generation of a trihybrid :-
  1. A 3
  2. B 4
  3. C 8
  4. D 16
Show answer

Correct answer: C

12
When a plant has two different alleles of a gene then it is called :-
  1. A Homozygous
  2. B Dioecious
  3. C Heterozygous
  4. D Monoecious
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Correct answer: C

13
Law of independent assortment of Mendel was proved by :-
  1. A Monohybrid cross
  2. B Reciprocal cross
  3. C Dihybrid cross
  4. D Back cross
Show answer

Correct answer: C

14
Which one of the following traits of garden pea studied by Mendel, was a recessive feature?
  1. A Axial flower position
  2. B Green seed colour
  3. C Green pod colour
  4. D Round seed shape
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Correct answer: B

15
Some of the dominant traits studied by Mendel were :-
  1. A Round seed shape, constricted pod shape and axial flower position
  2. B Yellow seed colour, inflated pod shape and axial flower position
  3. C Yellow seed colour, violet flower colour and yellow pod colour
  4. D Axial flower position, green pod colour and green seed colour
Show answer

Correct answer: B

16
Identify A and B, in the given diagrammatic representation of genetic disorder.
Principles Of Inheritance And Variation – NEET-5178
  1. A A = Tall stature with feminised character B = Turner's Syndrome
  2. B A = Turner's Syndrome B = Klinefelter Syndrome
  3. C A = Klinefelter Syndrome B = Turner's Syndrome
  4. D Both (A) and (C)
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Correct answer: D

17
Which of the following statements is/are correct?
(A) Turner’s syndrome is due to 44+XXY condition.
(B) Klinefelter’s syndrome is due to 44+X0 condition.
(C) Rudimentary ovaries are found in the individuals affected with Klinefelter’s syndrome.
(D) Turner’s syndrome and Klinefelter’s syndrome, both are related to sex chromosomes so somatic characters are not affected in these conditions.
(E) Gynaecomastia can be seen in individuals affected with Klinefelter’s syndrome.
  1. A A, B and E only
  2. B A, B, C and E only
  3. C A, B and D only
  4. D E only
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Correct answer: D

18
In man, gene producing the disease phenyl ketonuria also produces a number of abnormal phenotypic traits, which are collectively syndrome. This gene results mental retardation, widely spaced incisors, pigmented patches on the skin and excessive sweating such types of genes are called :-
  1. A Polygene
  2. B Pleiotropic gene
  3. C Lethal gene
  4. D Supplementary gene
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Correct answer: B

19
Select the correct statement(s) regarding the process mentioned in following diagram-
Principles Of Inheritance And Variation – NEET-5318 A. It is performed in unisexual flowers only.
B. It is performed before pollination.
C. Not required if the cross is between two dihybrid plants.
D. Mendel used this step for his hybridization experiments.
  1. A A and B only
  2. B B and D only
  3. C C and D only
  4. D A and C only
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Correct answer: B

20
Inheritance of skin colour in humans is an example of :-
  1. A chromosomal aberration
  2. B point mutation
  3. C polygenic inheritance
  4. D codominance
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Correct answer: C

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