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Principles of Inheritance and Variation

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

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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Ques. 2NEET (UG) 2024

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
Ques. 3NEET (UG) 2024

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
Ques. 4NEET (UG) 2024

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
Ques. 5NEET (UG) 2024

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
Ques. 6NEET (UG) 2024

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
Ques. 7RE-NEET (UG) 2024

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
Ques. 8RE-NEET (UG) 2024

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
Ques. 9RE-NEET (UG) 2024

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
Ques. 10RE-NEET (UG) 2024

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
Ques. 11RE-NEET (UG) 2024

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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