First slide

Pre-fertilisation : Structures and Events

Question

Which of these processes are necessary for the complete development of male gametophyte from pollen mother cell?

Easy

A

One meiotic division and two mitotic divisions
B

One meiotic division and one mitotic division
C

Two meiotic divisions and one mitotic division
D

Two meiotic divisions and two mitotic divisions

Solution

Microspore mother cell divides via meiosis to produce 4 haploid microspores. Each microspore divides via mitosis to produce one vegetative cell and one generative cell. Each generative cell divides via mitosis to form 2 male gametes. Therefore, for complete development of male gametophyte from pollen grain there is the requirement of one meiosis and two mitosis.

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