Assertion :Lack of Dosage compensation is found in female birds. Reason: Female birds are heterogametic.

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
Dosage compensation occurs in animals as diverse as mammals, insects, and nematodes, although the mechanisms involved differ from one another however heterogametic denotes the sex which has sex chromosomes that differ in morphology, resulting in two different kinds of gamete, e.g. (in mammals) the male and (in birds) the female. so,' the correct option is Both Assertion and Reason are correct and Reason is the correct explanation for Assertion'.

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