Males Are More Often Affected by X-Linked Traits Than Are

Multiple Choice

Males are more often affected by X-linked traits than are females because ________.

A) imprinting is more likely to occur on X chromosomes inherited from the mother than on Y chromosomes inherited from the father
B) X inactivation occurring in male effectively shuts down expression of any X chromosome genes
C) X chromosomes in males generally have more mutations than X chromosomes in females
D) males are hemizygous genes on the X chromosomes