Human Reproduction Question 12
12. Grey crescent is the area
[2005]
(a) at the point of entry of sperm into ovum
(b) just opposite to the site of entry of sperm into ovum
(c) at the animal pole
(d) at the vegetal pole
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Answer : b
Hints & Solutions
(b) On the surface of the egg opposite to the point of sperm entry, the peripheral area of the egg becomes lighter in colour and assumes a grey appearance. This area is crescentric in shape and is known as the grey crescent.
