MCAT Question A Day - 9/26/14 - Answer!

Sex-linked traits in men usually result due to genes located:

A. on both chromosomes of a pair of homologous chromosomes.

B. on one chromosome from a pair of homologous chromosomes

C. on both chromosomes of a pair of nonhomologous chromosomes

D. on one chromosome from a pair of nonhomologous chromosomes

D is correct. Sex-linked traits occur on the X or Y chromosomes. The X and Y chromosomes are not homologous.

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