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NEET UG BIOLOGY MCQ: PRINCIPLE OF INHERITANCE AND VARIATION
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Assertion (A): Male and female ratio is almost equal in this world.
Reason (R): Male and female genotype is XX and XY respectively.
Reason (R): Male and female genotype is XX and XY respectively.
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Correct option: A
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Option A (Both (A) & (R) are true and the (R) is the correct explanation of the (A)) is correct because the equal male and female ratio is a direct consequence of the sex chromosome system (XX/XY).
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