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Principles of Inheritance and Variation · Question 13

NEET (UG) 2024MCQMedium📈 Topic in 38% papers+4−1
1

Which one of the following can be explained on the basis of Mendel's Law of Dominance? Choose the correct answer from the options given below:

  1. A, B and C only
  2. A, C, D and E only
  3. B, C and D only
  4. A, B, C, D and E

Answer

(2) A, C, D and E only

Solution

The Law of Dominance states: (i) characters are controlled by discrete units called factors (D); (ii) factors occur in pairs (C); (iii) in a dissimilar pair of factors one member dominates (dominant) and the other does not (recessive) (A).

It explains the expression of only one of the parental characters in a monohybrid cross (E).

B is wrong: the reappearance of both characters in the F2 generation is explained by the Law of Segregation, not by dominance.

Hence A, C, D and E are correct.

Answer: (2)

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2

A pink flowered Snapdragon plant was crossed with a red flowered Snapdragon plant. What type of phenotype/s is/are expected in the progeny?

  1. Only red flowered plants
  2. Red flowered as well as pink flowered plants
  3. Only pink flowered plants
  4. Red, Pink as well as white flowered plants
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3

In a plant, black seed color (BB/Bb) is dominant over white seed color (bb). In order to find out the genotype of the black seed plant, with which of the following genotype will you cross it?

  1. BB
  2. bb
  3. Bb
  4. BB/Bb
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4

Match List I with List II Choose the correct answer from the options given below:

  1. A-I, B-II, C-III, D-IV
  2. A-II, B-I, C-III, D-IV
  3. A-III, B-IV, C-I, D-II
  4. A-IV, B-III, C-II, D-I
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5

Match List I with List II : Choose the correct answer from the options given below :

  1. A-I, B-II, C-III, D-IV
  2. A-II, B-III, C-IV, D-I
  3. A-III, B-IV, C-I, D-II
  4. A-IV, B-I, C-II, D-III
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6

As per ABO blood grouping system, the blood group of father is B+, mother is A+ and child is O+. Their respective genotype can be Choose the most appropriate answer from the options given below :

  1. A only
  2. B only
  3. C & B only
  4. D & E only
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7

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below.

  1. Statement I is true but Statement II is false
  2. Statement I is false but Statement II is true
  3. Both Statement I and Statement II are true
  4. Both Statement I and Statement II are false
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8

Match List-I with List-II: Choose the correct answer from the options given below:

  1. A-III, B-IV, C-II, D-I
  2. A-II, B-I, C-IV, D-III
  3. A-II, B-III, C-I, D-IV
  4. A-IV, B-I, C-III, D-II
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9

Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:

  1. Statement I is true but Statement II is false
  2. Statement I is false but Statement II is true
  3. Both Statement I and Statement II are true
  4. Both Statement I and Statement II are false
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10

When a tall pea plant with round seeds was selfed, it produced the progeny of : (a) Tall plants with round seeds and (b) Tall plants with wrinkled seeds. Identify the genotype of the parent plant.

  1. TtRr
  2. TtRR
  3. TTRR
  4. TTRr
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11

Aneuploidy is a chromosomal disorder where chromosome number is not the exact copy of its haploid set of chromosomes, due to : Choose the most appropriate answer from the options given below :

  1. C and D only
  2. D and E only
  3. A and B only
  4. B and C only
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