A phenotypic trait is considered sex-linked when
A) a trait occurs only in males.
B) the genes for the phenotype occur on X or Y chromosomes.
C) the phenotype is expressed only after sexual intercourse.
D) the phenotype occurs only in females.
E) the phenotype is polygenic for both sexes.

Question

Quizplus · Accepted Answer

A phenotypic trait is considered sex-linked when the genes responsible for the trait are located on the sex chromosomes, which are the X and Y chromosomes.

A Phenotypic Trait Is Considered Sex-Linked When