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

Show Answer

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.



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