Which of the following is TRUE?
A) Females can be heterozygous for sex-linked traits.
B) All traits on the sex chromosomes are associated with sexual development.
C) Males are heterozygous for the SRY gene.
D) The X and Y chromosomes are homologous.
E) Men pass their X-linked traits to their sons.

Question

Quizplus · Accepted Answer

Females have two X chromosomes, one of which can carry a trait that is recessive. Therefore, females can be heterozygous for sex-linked traits.

Answer: B
 Not all traits on the sex chromosomes are associated with sexual development. For example, color blindness is a sex-linked trait but is not directly associated with sexual development.

Answer: D
 The X and Y chromosomes are not homologous. They only share small regions of homology, which allows for pairing and segregation during meiosis.

Answer: E
 Men cannot pass their X-linked traits to their sons as they only pass their Y chromosome to their sons.

Which of the Following Is TRUE