Beth and Tom each have a sibling with cystic fibrosis, butneither Beth nor Tom nor any of their parents have thedisease. Calculate the probability that if this couple hasa child, the child will have cystic fibrosis. What would bethe probability if a test revealed that Tom is a carrier butBeth is not? Explain your answers.

Biology (MindTap Course List)
11th Edition
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Chapter11: The Basic Principles Of Heredity
Section: Chapter Questions
Problem 5TYU: Assume that the ratio of females to males is 1:1. A couple already has two daughters and no sons. If...
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Beth and Tom each have a sibling with cystic fibrosis, but
neither Beth nor Tom nor any of their parents have the
disease. Calculate the probability that if this couple has
a child, the child will have cystic fibrosis. What would be
the probability if a test revealed that Tom is a carrier but
Beth is not? Explain your answers.

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