Suppose that a hemophilic male (X-linked recessive allele) and a female carrier for the hemophilic trait have a nonhemophilic daughter with Turner syndrome.Nondisjunction could have occurred in
A)both parents.
B)neither parent.
C)the father only.
D)the mother only.
E)none of these.

Question

Quizplus · Accepted Answer

Turner syndrome occurs when a female has only one X chromosome. Since the daughter is nonhemophilic, she must have received the normal X chromosome from her carrier mother. The nondisjunction must have occurred in the father, resulting in the absence of a second sex chromosome.

Suppose That a Hemophilic Male (X-Linked Recessive Allele) and a Female