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Your Parents Are Both Heterozygous for the Recessive Disorder Phenylketonuria

Question 5

Multiple Choice

Your parents are both heterozygous for the recessive disorder phenylketonuria (PKU) . What is the probability that you will have the disorder?


A) 25%
B) 50%
C) 75%
D) 100%
E) 25% if your three siblings are healthy; 75% if your siblings also have the disorder

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