Question

Arrange the following in descending order

a) Number of bivalents formed during meiosis of a spore mother of Ophioglossum.

b) The number of chromatids seen on the equator at metaphase X in pollen mother cell of Haplopappus gracilis during meiosis.

c) The number of chromosomes found at one pole after anaphase II during meiosis in the butterfly.

d) The total number of chromosomes found in all daughter cells formed during meiosis from one megaspore mother cell in Potato.

• A. b, d, c, d
• B. a, c, d, b
• C. a, d, c, b
• D. d, c, b, a.

Answer 1

The correct option is B a, c, d, b

a) Number of bivalents formed during meiosis of a spore mother of Ophioglossum is equal to haploid chromosome number for it i.e. 630.

b) The number of chromatids seen on the equator at metaphase X in pollen mother cell of Haplopappus gracilis during meiosis is equal to haploid chromosome number for it i.e. 2.

c) 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.

d) 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. 48 = 48.

So, the correct option is 'a, c, d, b'.