X-linked recessive traits are
A) more common among females than males.
B) more common among males than females.
C) equally common among females and males.
D) none of the above; there is no data correlating X-linked recessive traits and sex.
B) more common among males than females. Since men inherit one X chromosome, they only need to inherit one recessive X-linked allele in order to develop the corresponding trait. If women inherit a recessive X-linked allele, their second X chromosome may have a dominant allele that prevents expression of the recessive trait.
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