Question

How many meiotic divisions are required to form 200 mature male gametophytes in angiosperm from microspore mother cell ?

1) 25
2) 50
3) 100
4) 200​

Answer 1

Answer:

3) 100

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Answer 2

The meiotic divisions are required to form 200 mature male gametophytes in angiosperm from microspore mother cell is 2) 50.

• The meiotic division is a reductional division in which chromosome number is reduced to half and four haploid gametes are formed at the end.
• So, the reduction division in 1 microspore produces 4 pollen grains that mature into 4 male gametophytes.
• 200 mature male gametophytes is produced by 200\4 = 50 meiosis.
• 1 meiosis = 4 mature male gametophytes. so, 50 meiosis = 50×4 = 200 mature male gametophytes.