A gene for sweat gland production is located on the X chromosome.A man who lacks sweat glands marries a woman who has normal sweat glands.Which of the following are possible phenotypes of their children?
A)All of the boys will lack sweat glands.
B)The boys will be mosaic;they will have patches of skin with sweat glands and patches of skin lacking sweat glands
C)Half of the girls will have sweat glands and half of the girls will lack sweat glands
D)Half of the boys will have sweat glands and half of the boys will lack sweat glands
E)The girls will be mosaic;they will have patches of skin with sweat glands and patches of skin lacking sweat glands

Question

Quizplus · Accepted Answer

Since the gene is on the X chromosome, females (XX) can be mosaics due to X-inactivation, leading to patches with and without sweat glands.

A Gene for Sweat Gland Production Is Located on the X