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.

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.

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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) Hi…

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