The absence of sweat in humans is an iron recessive trait linked by the X chromosome.

The absence of sweat in humans is an iron recessive trait linked by the X chromosome. The father does not suffer from this deficiency, and the mother is homozygous for this trait. How will this trait be inherited in the offspring?

Let us designate the normal development of the glands as X (A), the presence of the disease as X (a).

Genotype of a healthy father: X (A) Y, genotype of a mother with pathology: X (a) X (a).

R: X (a) X (a) x X (A) Y

G: X (a) x X (A), Y

F: X (A) X (a) – 50% healthy girl,

X (a) Y – 50% sick boy.

Answer: girls will be healthy carriers, boys will suffer from the absence of sweat glands.