The tendency to baldness is inherited as a recessive trait linked to the x-chromosome in a family where

The tendency to baldness is inherited as a recessive trait linked to the x-chromosome in a family where a man is prone to baldness, a boy is born as prone to baldness, determine the genotypes of the offspring and parents.

The trait is transmitted with the X chromosome, which means that the child in this family inherited the chromosome that determined his gender – Y from his father, and from his mother – X, carrying the gene for baldness (f). Accordingly, the genotype of the father is XfY. The condition does not indicate that the mother is prone to baldness, therefore, her genotype looks like this – ХFХf. The boy’s genotype is XfY. These parents may have children with the following genotype variants: XFXf (healthy daughter), XfXf (daughter prone to baldness), XFY (healthy son), XfY (son prone to baldness). The probability of each option is 25%.