Question

How many meiosis are required to produce 102 pollen grains?

How many meiosis are required to produce 1000 pollen grains in Cyprus?

Answer 1

When pollen mother cell undergoes meiotic division, it produces 4 pollen grains. So for generation of 100 pollen grain no of division required= 100/4=25
25 division will produce less pollen grains.
As per ques for 102 pollen grain, no of divisions required = 25+ 1( produces another 4 pollen grain)=26
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In case of Cyperus the pollen mother cell produces 4 pollen grain, but 3 of them degenerate. So for 1000 pollen grains 1000 divisions are required.