試題詳解

34. Why are males more often affected by sex-linked traits than females?
(A) Testosterone alters the effects of mutations on the X chromosome.
(B) Males are hemizygous for the X chromosome.
(C) Estrogen often compensate for the effects of mutations on the X chromosome.
(D) X chromosomes in males generally have more mutations than X chromosomes in females.
(E) The SRY gene protects male to be affected by mutations on the X chromosome.