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Question

Starting with microspore mother cells, what is the least number of meiotic and mitotic divisions needed for the formation of 500 male gametes in an angiosperm?

A
65 and 500
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B
63 and 252
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C
63 and 500
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D
63 and 504
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Solution

The correct option is C 63 and 500

  • In angiosperms, one microspore mother cell undergoes meiosis to form four microspores or pollen grains.
  • Each pollen grain by undergoing two mitotic divisions produces two male gametes. 63 microspore mother cells undergo 63 meiotic divisions and form into 252 microspores or pollen grains.
  • These 252 microspores undergo 504 mitotic divisions and form into 504 male gametes.

So, the correct option is ’63 and 500’.

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