A human male carrying an allele for a trait on the X chromosome is
A) heterozygous.
B) homozygous.
C) hemizygous.
D) monozygous.
E) holozygous.

Name: A human male carrying an allele for a trait on the X chromosome is A) heterozygous. B) homozygous. C) hemizygous. D) monozygous. E) holozygous.
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Question

Quizplus · Accepted Answer

Males only have one X chromosome, so they cannot be homozygous or heterozygous for traits on the X chromosome. Instead, they are hemizygous, meaning they only have one copy of the allele.

A Human Male Carrying an Allele for a Trait on the X