Phenylketonuria (PKU) is a disorder caused by a recessive allele. Two carrier individuals have progeny. Answer the following questions in order and show solutions whenever relevant. If they have a normal child, what is the probability that he or she will be heterozygous? If they have three children, what is the probability of having 2 affected children and one normal child?

Human Heredity: Principles and Issues (MindTap Course List)
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Chapter18: Genetics Of Behavior
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Phenylketonuria (PKU) is a disorder caused by a recessive allele. Two carrier individuals have progeny. Answer the following questions in order and show solutions whenever relevant.

    1. If they have a normal child, what is the probability that he or she will be heterozygous?
    2. If they have three children, what is the probability of having 2 affected children and one normal child?
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