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Explain the development of mature embryo …

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Explain the development of mature embryo sac, from the time of formation of megaspore mother cell

Posted by Aayush Sharma 7 months, 3 weeks ago

CBSE > Class 12 > Biology

2 answers

Masuma Kosar 7 months, 2 weeks ago

Yes

Muskan Sharma 7 months, 3 weeks ago

The megaspore mother cell undergoes meiosis to give rise to 4 haploid cells. Three haploid cells degenerate and one survives to become the embryo sac. The embryo sac enlarges in size and the haploid nucleus undergoes mitosis to form 2 haploid nuclei. The two haploid nuclei further undergo mitosis to form 4 haploid nuclei within the embryo sac. In the final round of mitosis 8 haploid nuclei are produced. Hence, the functional megaspore undergoes 3 mitotic divisions to form eight celled mature embryo sac.

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