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Principles of Inheritance and Variation · Question 19

RE-NEET (UG) 2024MCQEasy📈 Topic in 38% papers+4−1
1

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

Answer

(2) Statement I is false but Statement II is true

Solution

Statement I is false: when many alleles of a single gene govern a character, it is called multiple allelism (e.g. ABO blood groups). Polygenic inheritance is the control of a trait by three or more genes.

Statement II is true: in polygenic inheritance, the effect of each allele is additive (e.g. human skin colour).

Answer: (2)

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2

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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3

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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4

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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5

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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6

The mother has A+ blood group, the father has B+ and the child is A+. What can be the possibility of genotypes of all three, respectively? Choose the correct answer from the options given below:

  1. C and D
  2. D and A
  3. A and B
  4. B and E
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7

Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by

  1. Sutton and Boveri
  2. Alfred Sturtevant
  3. Henking
  4. Thomas Hunt Morgan
NEET (UG) 2023
8

The phenomenon of pleiotropism refers to

  1. Presence of two alleles, each of the two genes controlling a single trait
  2. A single gene affecting multiple phenotypic expression
  3. More than two genes affecting a single character
  4. Presence of several alleles of a single gene controlling a single crossover
NEET (UG) 2023
9

Which of the following statements are correct about Klinefelter’s Syndrome? Choose the correct answer from the options given below :

  1. C and D only
  2. B and E only
  3. A and E only
  4. A and B only
NEET (UG) 2023
10

Broad palm with single palm crease is visible in a person suffering from-

  1. Turner’s syndrome
  2. Klinefelter’s syndrome
  3. Thalassemia
  4. Down’s syndrome
NEET (UG) 2023
11

Which one of the following symbols represents mating between relatives in human pedigree analysis?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
NEET (UG) 2023

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