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Home  >>  JEEMAIN and AIPMT  >>  Biology  >>  Reproduction
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Assertion (A): Only one sperm can fertilise an ovum. Reason (R): During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of additional sperms. Regarding (A) and (R):

( A ) A is incorrect but R is correct
( B ) Both A and R are correct & R is the correct explanation for A
( C ) A is correct but R is incorrect
( D ) Both A and R are correct but R is not the correct explanation for A
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1 Answer

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(B) is the right answer.

During fertilisation, a sperm comes in contact with the zona pellucida layer of the ovum and induces changes in the membrane that block the entry of additional sperms. Thus, it ensures that only one sperm can fertilise an ovum.
answered Apr 3, 2014 by pady_1
 

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