Question

Explain development of male gametophyte.(4marks)

Answer 1

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The pollen grains are released from the pollen-sacs at the two-celled stage. The generative cell further divides to form two male gametes. These male gametes are released into the embryo sac to undergo fusion with the egg and the central cell...

Pollen grains display germination that is initiated in pollen sac which is referred to as precocious germination wherein a large central vacuole formation causes the nucleus to be pushed to one side post which the nucleus goes through mitosis that gives rise to two daughter nuclei.

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Answer 2

Explanation:

2N (MICROSPORE MOTHER CELL)

/ \

N N (MEOSIS)

/ \ / \

N N N N (MICROSPRE CELL)

/ \

N N (VEGETATIVE NUCLEAR)

/ \

N N ------› SPERM

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