The probability of inheriting color deficiency is related to the chromosomal genes of the parents and the sex of the baby born. 1. father color weak, mother color weak: the probability of the child color weak 100%, the father carries one color weak gene x, the mother carries two color weak genes xx, color weak gene inheritance, is inherited on the x chromosome. 2. The father is weak, the mother is not weak, but carries a weak gene: 50% probability that the son is weak, 50% probability that the daughter is weak, if the daughter is not weak, she must carry a weak gene. 3. The father is not weak in color, the mother is weak in color: 100% probability that the son is weak in color, 100% probability that the daughter is not weak in color, but carries a gene for weak in color. 4. The father is not weak, the mother is not weak, but with a weak gene: 50% probability that the son is weak, 100% probability that the daughter is not weak, but 50% probability that she carries a weak gene. Therefore, the genetic probability of color weakness needs to be analyzed on a case-by-case basis.