GPB MCQ Quiz 162 for ICAR JRF/SRF/ARS Exam Preparation

Question 50: The pollen fertility is reduced in the presence of

A) Deletion

B) Detection

C) Duplication

D) Interstitial deletion

Explanation: Deletion in a chromosome often reduces pollen fertility due to loss of essential genetic material.

Question 51: Structural changes usually take place during

A) Interphase

B) Telophase

C) Anaphase

D) Metaphase

Explanation: Structural chromosomal changes often become visible during metaphase when chromosomes are condensed.

Question 52: Chromosomes which do not differ in morphology and number in male and female sex and rarely contain sex determining genes are

A) Allosomes

B) Dicentric chromosome

C) Autosomes

D) None

Explanation: Autosomes are chromosomes that are the same in both sexes and do not usually carry sex-determining genes.

Question 53: Normal member of chromosome complements of a species which are essential for normal growth and development is

A) A-chromosome

B) B-chromosome

C) C-chromosome

D) D-chromosome

Explanation: A-chromosomes are the normal essential chromosomes of a species required for proper growth and development.

Question 54: A chromosome in which centromere is located very near to one end or has sub-terminal position is called

A) Holokinetic chromosome

B) Acrocentric chromosome

C) Acentric chromosome

D) Metacentric chromosome

Explanation: Acrocentric chromosomes have the centromere located near one end, creating a long arm and a short arm.

Question 55: Diffused position of centromere can be found in

A) Holokinetic chromosome

B) Telocentric chromosome

C) Meta centric chromosome

D) Acrocentric chromosome

Explanation: Holokinetic chromosomes have centromeric activity along their entire length rather than at a single point.

Question 56: Terminal position of centromere can be found in

A) Meta centric chromosome

B) Telocentric chromosome

C) Holokinetic chromosome

D) Acrocentric chromosome

Explanation: Telocentric chromosomes have the centromere at the very end, giving them a single chromosomal arm.

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