Consider the case of X-linked inheritance of a recessive mutant allele.Among progeny from a cross of an unaffected male and a heterozygous female carrier,
A) all male offspring of would show the trait.
B) all female offspring would be carriers.
C) all male offspring who receive the recessive mutant X chromosome would show the trait.
D) all female offspring who receive the recessive mutant X would show the trait.
E) roughly half of the female offspring would show the trait.

Question

Quizplus · Accepted Answer

In X-linked inheritance, males receive only one X chromosome from their mother and no X chromosome from their father. Therefore, if the mother is a carrier of a recessive mutant allele, half of her sons would receive the mutant X chromosome and show the trait. On the other hand, females receive one X chromosome from their mother and one from their father. If the father is unaffected, none of the daughters would show the trait, but half of them would be carriers.

Consider the Case of X-Linked Inheritance of a Recessive Mutant