X-linked dominant traits affect both males and females. Affected males must have affected mothers (unless the males possess a new mutation), and they pass the trait on to all their daughters.
-A male affected with an X-linked dominant trait will have what proportion of offspring affected with the trait?
A) 1/2 sons and 1/2 daughters
B) All sons and no daughters
C) All daughters and no sons
D) 3/4 daughters and 1/4 sons

Question

Quizplus · Accepted Answer

A male with an X-linked dominant trait will pass the affected X chromosome to all his daughters (since daughters inherit one X chromosome from their father), but none of his sons (since sons inherit the Y chromosome from their father).

X-Linked Dominant Traits Affect Both Males and Females