Assertion (A): Pleiotropy refers to a single gene affecting multiple phenotypic traits. Reason (R): Phenylketonuria (PKU) is an example of pleiotropy where a mutation in a single gene leads to mental retardation, reduction in hair and skin pigmentation.
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is NOT the correct explanation of A
- CA is true but R is false
- DA is false but R is true
✓ Correct answer: A
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