Almost all sex-linked disorders involve which of the following chromosomes?

Question

Quizplus · Accepted Answer

Sex-linked disorders involve genes located on the sex chromosomes, which in humans are the X and Y chromosomes. However, the vast majority of sex-linked disorders are linked to genes on the X chromosome, as the Y chromosome carries very few genes. Therefore, almost all sex-linked disorders involve the X chromosome. Choice B, Y, is incorrect as sex-linked disorders involving the Y chromosome are very rare. Choices C and D, 1 and 22, are incorrect as these are autosomes (non-sex chromosomes) and are not involved in sex-linked disorders.

Almost All Sex-Linked Disorders Involve Which of the Following Chromosomes