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A man and a woman, each carries a mutant...

A man and a woman, each carries a mutant allele for phenylketoneuria, an inborn error of metabolism. Howerver, neither of them has this disease. The probability that their second child will suffer from phenylketoneuria is:

A

0.25

B

0.5

C

0.75

D

1

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The correct Answer is:
A
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