A property professional with nearly 20 years experience of estate agency in Suffolk and North Essex. During that time I have carried out market appraisals on over 5000 residential properties and have helped over 1500 people successfully sell their home.
Therefore, a son from a color-blind mother (who receives the trait from his mother on the X-chromosome) will always be color-blind, regardless of the state of the father (who can only give his son a Y-chromosome).
Since mom is a carrier, each daughter has a 50% chance to get a gray X and a 50% chance to get a red one from her. If she gets a gray from mom, she will end up with two gray Xâs because of dad. She will be color blind. So in this case, each of this coupleâs children has a 50% chance for being color blind.