Ian and Bryony Are Both Carriers for Two Autosomal Recessive

question 14

Multiple Choice

Ian and Bryony are both carriers for two autosomal recessive disorders,PKU (chromosome 12) and cystic fibrosis (chromosome 7) .They are expecting a daughter.What is the probability that she will have PKU but not CF?

• A)9/16
• B)3/16
• C)1/2
• D)1/16

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Definitions:

Antitrust Question

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