Assertion :Long neck of Giraffe is due to centripetal selection. Reason: During directional selection when the mean value of phenotype coincides with new optimum environmental conditions, centripetal selection takes over.

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
Centripetal selection is the type of natural selection operates in stable environmental conditions and in a short span of time, when species living in a particular environmental conditions are perfectly adapted in it. Long neck of Giraffe is due to centripetal selection.
Whereas directional selection is always associated with environmental change, owing to which average characters become non-adaptive. So when directional selection when the mean value of phenotype coincides with new optimum environmental conditions, centripetal selection takes over.
So the correct answer is 'Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.

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Statement: Long neck of Giraffe is due to centripetal selection
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