Assertion :In pigeons, females are heterogametic and males are homogametic. Reason: In pigeons, females have ZW sex chromosomes and males have ZZ sex chromosomes.

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
There are different types of sex determination techniques. One of them is the XX-XY type of determination as in humans. Another is the ZZ-ZW type of sex determination. It has seen in birds.
In this type, males are homogametic ZZ, having two similar sex chromosomes. Females are heterogametic ZW, So, in birds, the sex of the offsprings depends on the type of female sex chromosome that is fertilized by men.
So, both assertion and reason statements are correct.

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