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theresamarieuehling2
theresamarieuehling2
18.03.2021 • 
Biology

Assume that polydactyly (the presence of extra digits) in humans is an autosomal dominant trait that exhibits 8% penetrance. A Cuban-born professional baseball player, who has six fingers on his throwing hand, marries an American woman whose father was a distinguished professional quarterback in the NFL. Having six fingers on your throwing hand would be an advantage when throwing a large football particular during wet, slippery conditions. There would be no need to remove air from footballs to make them easier to grip. This retired quarterback has hired you to determine the probability that the first child will be a boy with six fingers. Assume that this trait is controlled by a single gene. Assume that the American woman has no history of polydactyly in her family and for the baseball player he remembers a great uncle on his father side of family having six fingers but no one on his mother side of the family exhibited six fingers. What do you tell the retired quarterback about the possibility of him having his first grandchild being a boy with six fingers

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