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

Explanation:

Y - linked inheritance means that the gene causing the disorder is located on the Y - chromosome. Since only males have a Y - chromosome, the disorder is passed from father to son. In this case, the father has the disorder and the son has it while daughters do not, which is characteristic of Y - linked inheritance. X - linked inheritance would have different patterns depending on whether it is recessive or dominant and would affect daughters in different ways. Polygenic inheritance involves multiple genes and is not indicated here. Codominant inheritance is about both alleles being expressed, which is not relevant to this pattern.

Answer:

A. Y - linked