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Phenylketonuria is a sex-linked dominant trait.

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in Biology – Class 12 by (271k points)
Phenylketonuria is a sex-linked dominant trait.

(a) True

(b) False

I got this question in a national level competition.

Origin of the question is Inheritance Principles topic in division Principles of Inheritance and Variation of Biology – Class 12

1 Answer

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Right choice is (b) False

Explanation: Phenylketonuria is not a sex-linked trait. Instead, it is an inborn error of metabolism which is also inherited as an autosomal recessive trait which means this disease will only occur in a progeny if it carries both the recessive genes from the parents.

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