Both father and mother have allele for PKU but are phenotypically normal. What is the probability that their child will have the disease?A. 0.25B. 0.5C. 0.75D. 1

Both father and mother have allele for PKU but are phenotypically norm

1.	Both father and mother have allele for PKU but are phenotypically normal. What is the probability that their child will have the disease?A. 0.25B. 0.5C. 0.75D. 1
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Both father and mother have allele for PKU but are phenotypically normal. What is the probability that their child will have the disease?A. 0.25B. 0.5C. 0.75D. 1

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