Question

Color blindness is a sex-linked 'trait that is carried on the X chromosome. If a boy

is born color-blind, what would have to be true?
a) His father had normal vision.
b) His grandmother was color-blind.
*c) His mother carried at least one gene for color blindness.
d) His grandfather passed on the color-blind trait to his father.

Answer 1

c) His mother carried at least one gene for color blindness.

Step-by-step explanation: