Name: Apomixis and Polyembryony
Uploaded: 2019-07-19
Duration: 7 min 23 s
Description: Apomixis and polyembryony are unusual forms of reproduction that allow seed formation, for continuity of life, without genetic shuffling. Do you want to know...

Question

Differentiate between microsporogenesis and megasporogenesis. Which type of cell division occurs during these events. Name the structures formed at the end of these two events.

Accepted Answer

The process of microspore formation by meiosis is called microsporogenesis. The process of megaspore formation by meiosis is called megasporogenesis.

Feature Microsporogenesis Megasporogenesis

Definition Microsporogenesis is the process of formation of microspores or the pollen grains from the microspore mother cells by meiosis.
Megasporogenesis refers to the formation of the megaspores (female gametes) from the megaspore mother cell.

Microsporogenesis and megasporogenesis occur through meiotic cell division. The microsporogenesis gives rise to pollen grain that develops into a male gametophyte. In both of these processes, meiotic division takes place resulting in the formation of haploid gametes. The megasporogenesis gives rise to megaspore that develops into the embryo sac. Microsporogenesis results in the formation of a pollen tetrad while megasporogenesis results in the formation of the embryo sac or the female gametophyte which develops from megaspore.

Embibe Experts Solutions for Exercise 1: Uttarakhand Board-2020

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