M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:

A woman and her husband have five children. The woman and at least one son are afflicted with hemophilia, a recessive, sex-linked trait. Which of the following statements must true about the family?

I. The husband is a hemophiliac
II. All of the sons are hemophiliacs
III. All of the daughters are hemophiliacs
IV. All of the children are either hemophiliacs or carriers

A

I and II only

B

II and IV only

C

IV only

D

I, II, and III