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%

Question

Quizplus · Accepted Answer

Since the trait is Y-linked, only males can inherit it from their fathers. The daughter cannot pass the Y chromosome to her son, so the grandson cannot inherit the trait.

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