question_answer

In frog chromosome number is reduced to half:

A)  when 2nd polar body is separated

B)  when 2nd polar body is divided

C)  when 3rd polar body is separated

D)  when 1st polar body is separated

Correct Answer: D

Solution :

 Oogenesis is process of formation of ova. So, in frog, chromosomes number is reduced to half when first polar body is separated and secondary oocyte (n) is formed during oogenesis. Because meiosis-I takes place in primary oocyte.