Pam is a carrier for hemophilia while her husband,Martin is not a hemophiliac.Which of the following would be true under these conditions?
A)All of their daughters would be hemophiliacs.
B)There is a 50 percent chance that a daughter would be a hemophiliac.
C)All of their sons would be hemophiliacs.
D)There is a 50 percent chance that a son would be a hemophiliac.

Question

Quizplus · Accepted Answer

Hemophilia is an X-linked genetic disorder.Since Pam is a "carrier," it follows that one of her two X chromosomes has the faulty gene for hemophilia while the other X chromosome is normal.Martin is not a hemophiliac,so it follows that his one X chromosome is normal.Under these conditions,50 percent of their daughters would be carriers,50 percent of their sons would be hemophiliacs and the other 50 percent of daughters and sons would be normal.

Pam Is a Carrier for Hemophilia While Her Husband,Martin Is