Question

.Hemophilia is a sex-linked disorder that is caused by a defective gene on the X chromosome. What will be the pattern of inheritance of the offspring of a hemophiliac father?

Answer 1

Since the father has a defective X chromosome, this can be understood as the father have xY chromosomes, with x being the defective one. Since the father will only pass on his Y chromosomes to his sons, none of his sons will be affected. However, the father will pass on his x chromosomes to his daughters. Therefore, his daughters will all be affected.