Assume That Having Three Nostrils Is Inherited as a Sex-Linked

question 20

Multiple Choice

Assume that having three nostrils is inherited as a sex-linked trait on the Y chromosome. A man with three nostrils has a daughter who has a son with a man who has only two nostrils. What is the probability that the three-nostril man's grandson has three nostrils?

• A)0%
• B)25%
• C)50%
• D)100%

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