Question

Select the correct answer. in a family, the father is affected by a genetic disorder. The son in the family has the same disease, but the daughters do not have it. What type of inheritance is this?
A. Y-linked
B. X-linked
C. Polygenic
D. Codominant

Answer 1

B. X-linked. When traits are more common in males, this means that it is linked to the X chromosome and a dominant trait. In order for the trait to show, it would need one dominant gene. Since males only have one X chromosome, this makes the change of a gene being dominant 50/50. The daughters do not have it because they have the recessive form of the gene on both of their X chromosomes.