First slide

Pre-fertilisation : Structures and Events

Question

Tetrasporic embryo sac is one, in which four

Moderate

A

microspores form the embryo sac
B

megaspore mother cells form embryo sac
C

megaspores form the embryo sac
D

microspore mother cells form the embryo sac

Solution

Tetrasporic embryo sac : It develops from coeno-megaspore i.e., four megaspore nuclei without cytokinesis at the end of meiosis in MMC. The nuclei are genetically of four types.

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