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).
Girls- 50%. The colorblindness gene is found in the X-chromosome. Women have XX and guys have XY. When having a child the woman always gives off an X chromosome while men can give off either an X (having a girl) or a Y (having a boy). Women can only be color blind if both X-chromosomes have the colorblindness gene.