During cleavage in fertilized egg, which centriole of sperm is responsible for formation of astral rays?

Proximal centriole

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Distal centriole

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Ring centriole

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Nebenkem

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Solution

The correct option is A Proximal centriole
During the cleavage in a fertilized egg, the proximal centriole of the sperm is responsible for the formation of aster rays. After the incorporation of sperm into the oocyte, sperm aster forms from the proximal centriole which allows for the pronuclear opposition.

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