Why do x-linked conditions appear more frequently in males than in females?

Question

why do x-linked conditions appear more frequently in males than in females?

a)a male with a nonfuncioning allele on x does not have another allele of the gene

b)males have no x chromosomes

c)the y chromosome carries many alleles that are recessive to alleles on the x

d)males are more likely to inherit an extra chromosome thatn females

e)females have no x chromosomes

Answer 1

a) is correct>In females a recessive defect on 1 X-chromosome is balanced by a healthy spot on the other chromosome

Answer 2

a)  Males have a single X chromosome and no additional X chromosome that could carry a normal allele to mask the effects of a defective allele on the single X chromosome.  Females carry two X chromosomes so a normal allele on one chromosome can mask the effects of a defective allele carried on the other chromosome.

Answer 3

a) Is the correct answer.