Assertion :Polyspermy is inhibited by zona pellucida Reason: Sperm induces changes in zona pellucida

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Polyspermy is a condition in which egg has been fertilized by more than one sperm. It is inhibited by zona pellucida. After the entry of first sperm, the sperm induces changes in the zona pellucida. These changes result in the depolarization of the egg plasma membrane. This depolarization prevents the entry of additional sperms.
Thus, the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.'

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