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).
Now if your daughters married men who weren't colorblind, their Punnett square would look like this: As you can see, there would be a 1 in 4 or 25% chance for a daughter who is a carrier (X c X), a 25% chance for a colorblind son (X c Y), and a 50% chance for a child without the colorblind gene (XX, XY).t is different for a son who can only get the gene that causes colorblindness from his mother and only needs one copy to be colorblind. These two different situations arise from the fact that the gene that causes colorblindness is found on the X chromosome and is recessive.