The woman's father had normal color vision but her mother was color-blind. color-blindness is an x-linked recessive disorder. what are the chances that this man and woman will give birth to a color-blind girl (restated: of all the possible children, how many would be female and color-blind)

I'm not sure what the answer is but I know that since it is recessive she'd need to have them on both her X chromosomes for her to be color blind (meaning she'd have to inherit the gene from both her parents). Because males have one X (and one Y) they would only need one x-linked recessive gene to be effected with color blindness.
Because of this, color blindness is sex-linked and happens much more in males than females.

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