Question

Arrange the following in descending order.

(A) A number of bivalents formed during meiosis of a spore mother cell of Ophioglossum.
(B) Number of chromatics seen on equatorial at metaphase I in pollen mother cell of Haplopappus gracilis during meiosis.
(C) Number of chromosomes found at one pole after anaphase II during meiosis in butterfly (Agrodiaetus sps)
(D) The total number of chromosomes found in all daughter cells formed during meiosis from one megaspore mother cell in white potato.

• A. B D C A
• B. A C D B
• C. A D C B
• D. D C B A

Answer 1

Answer: (B)

A C D B

• The number of bivalents formed during meiosis of a spore mother of Ophioglossum is equal to haploid chromosome number for it i.e. 630.
• The number of chromatids seen on the equator at metaphase X in pollen mother cells of Haplopappus gracilis during meiosis is equal to haploid chromosome number for it i.e. 2.
• The number of chromosomes found at one pole after anaphase II during meiosis in the butterfly is equal to haploid chromosome number for it i.e. 190.
• The total number of chromosomes found in all daughter cells formed during meiosis from one megaspore mother cell in Potato is equal to the number of diploid chromosome number i.e. 24 (the cultivated potato is a tetraploid with n = 12)

Hence, the correct answer is B.