Question

Recessive sex-linked traits such as color blindness appear more frequently in

males because

A. males inherit only one sex chromosome.
B. males inherit two copies of every sex-linked allele.
C. sex-linked alleles are carried only on Y chromosomes.
D. males inherit only one sex-linked allele.

Answer 1

The answer is D

Explanation: In humans, recessive sex-linked traits generally occur on the X chromosome. Since males are (XY), they will inherit only one sex-linked allele on their X chromosome.

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