Assertion :XX-XY type of sex determination mechanism is an example of female heterogamety and is found in Drosophila. Reason: Male heterogamety is seen in moths where males produce two different types of gamete.

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 D Both Assertion and Reason are incorrect
Chromosomal determination of sex is based on heterogamety or occurrence of two types of gamete in one of the two sexes. In Drosophila XX-XY type of sex determination is found where males are heterogametic.
In moths, ZO-ZZ type of sex determination occurs where males are homogametic.

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