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A man is affected with brachydactyly, an...

A man is affected with brachydactyly, an autosomal dominant trait that cause shortening of several fingers. What is the risk that the man's first child will have brachydactyly ?

A

0.25

B

0.5

C

0.75

D

1

Text Solution

Verified by Experts

The correct Answer is:
B
The gentype of the man is Bb and his wife bb. The risk depends on whether a B of b sperm fertilizes the egg,which is a risk of 50%.
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