Q.
How many post-meiotic mitotic divisions will be required to produce 100 zygotes in a flowering plants?
2062
185
NTA AbhyasNTA Abhyas 2020Sexual Reproduction in Flowering Plants
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Solution:
A pollen grain is formed by meiosis in pollen sac. It undergoes two mitotic divisions to form 2 male gametes. A megaspore is formed by meiosis in ovule. It undergoes three nuclear divisions to form embryo sac which has one egg cell. In flowering plants double fertilization occurs. Thus for formation one zygote 5 mitotic divisions are required. Thus for 100 zygotes, 500 mitotic divisions will be required.