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An Individual Has PKU

Question 67

Multiple Choice

An individual has PKU.Which of the following must be true?


A) His biological parents must both have had PKU.
B) At least one of his biological parents must have had PKU.
C) At least one of his biological parents must have been a carrier for PKU.
D) Each of his parents must have either been a carrier for, or had, PKU.

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