First slide

Pre-fertilisation : Structures and Events

Question

Three sequential mitotic divisions in which of the following cell will ultimately form an embryo sac?

Easy

A

Megaspore
B

Microspore
C

Megaspore mother cell
D

Microspore mother cell

Solution

Megaspore mother cell undergoes meiosis to form 4 haploid megaspores. Out of the four, one megaspore remains functional and further show continuous 3 free nuclear mitotic divisions to form 8 nucleated, 7-celled embryo sac.

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