In a family of four including a normal mother, a normal father, a color blind son and a normal son; who do you think has the defective X gene other than the affected son?

In a family of four including a normal mother, a normal father, a colo

1.	In a family of four including a normal mother, a normal father, a color blind son and a normal son; who do you think has the defective X gene other than the affected son?
A.	The mother
B.	The father
C.	The normal son
D.	The effected son only
Answer» B. The father