Question

fill in the blank question
males are affected by recessive x-linked traits more often than are females because they only have ______ x chromosome.

Explanation:

X-linked recessive traits are expressed when an individual has the recessive allele on their X chromosome. Females have two X chromosomes, so they can carry a dominant normal allele to mask the recessive one. Males only possess a single X chromosome, so if it carries the recessive allele, the trait will be expressed.

Answer:

one