If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?

Colour blindness is X-linked recessive ($X^c$).Female is colour blind: Genotype $X^c{X}^c$.Man's mother was colour blind ($X^c{X}^c$), so she must have passed $X^c$ to her son. The man is $X^{c}Y$.Cross: $X^c{X}^c\times X^{c}Y$.Daughters: $X^c{X}^c$ (All colour blind).Sons: $X^{c}Y$ (All colour blind).$100\%$ of the progeny will be colour blind.