Hunter syndrome is a progressively debilitating recessive disorder that is inherited on the X chromosome.

A father without Hunter syndrome and an unaffected carrier mother have a child.
Which of the following statements is true?

Choose 1

(Choice A)
A
They have a 50% chance of having an affected daughter.

(Choice B)
B
They have a 100% chance of having an affected son.

(Choice C)
C
All of their children will be unaffected carriers.

(Choice D)
D
No daughter they have will be affected.