Recessive X-Linked Traits Are More Likely to Be Expressed in a Male

Multiple Choice

Recessive X-linked traits are more likely to be expressed in a male fruit fly than a female fruit fly because

A) males are haploid.
B) the male's phenotype results entirely from his single X-linked gene.
C) the male chromosome is more fragile than the female chromosome.
D) the male chromosome is more susceptible to mutations.