Question

Color blindness is a recessive sex-linked human trait. If a color-blind father and a mother with normal color vision have a color-blind son, what must be the mother's genotype?

A. XNXn
B. XNXN
C. XnYn
D. XNY

Answer 1

A. XNXn

Step-by-step explanation:

looks like it's a 50% chance of color blindness