A recessive X-linked trait is a trait accompanied with mutations on the gene on the X chromosomes.
If a normal couple then have a child that is color-blind. At least one member of the couple's families is colorblind, this is most likely the mother's father.
- Since the couple are normal, it mean the father is not a carrier as he has only one X chromosome and the mother is a carrier with one normal X and the other affected.
- Most of the time a male carrying the trait is affected meaning for the woman to be a carrier she must have gotten it from her father who is color-blind.
Learn more: https://brainly.com/question/13204877
