GPB MCQ Quiz 161 for ICAR JRF/SRF/ARS Exam Preparation

Question 57: Any change in chromosome number from the diploid state is called

A) Heteroploidy

B) Euploidy

C) Homoploidy

D) None of above

Explanation: Heteroploidy refers to any variation in chromosome number from the normal diploid number.

Question 58: The change in entire genome is called

A) Euploidy

B) Heteroploidy

C) Homoploidy

D) None of above

Explanation: Euploidy refers to a change affecting the entire genome, often resulting in a multiple of the basic chromosome set.

Question 59: Colchicine is used in induction of

A) Polyploidy

B) Haploidy

C) Both

D) None

Explanation: Colchicine disrupts spindle formation during mitosis, leading to polyploidy induction.

Question 60: Inversion was first discovered by Sturtevant in 1926 in

A) Drosophila

B) Maize

C) Nicotina

D) Mouse

Explanation: Inversion, a chromosomal rearrangement, was first observed in Drosophila by Sturtevant.

Question 61: Translocation is

A) When one way or reciprocal transfer of segments between non-homologous chromosomes occurs.

B) When there is mutual exchange of segments between non-homologous chromosomes occurs

C) Both

D) None

Explanation: Translocation involves the movement of chromosome segments between non-homologous chromosomes.

Question 62: Reciprocal translocation is

B) When there is mutual exchange of segments between non-homologous chromosomes occurs

A) When one way or reciprocal transfer of segments between non-homologous chromosomes occurs

C) Both

D) None

Explanation: Reciprocal translocation involves mutual exchange of segments between two non-homologous chromosomes.

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