Acolor-blind women marries a man who is not color-blind and all their sons are color-blind but none of their daughters are color-blind . color-blindness is likely ?

Haven't taken biology in a while but recessive gene or sex linked trait. It is both.

The colorblind trait is linked to the X chromosome, and can only be passed down with the x chromosome. That's what makes it sex linked. It's also recessive, meaning the mother could carry with a different dominant gene.