What Causes Color Blindness?
Color blindness is an inherited disorder traced back to the X chromosome (Mandal). Color blindness affects 8% of males, but only .5% of females. This is because for a male to be color blind, they only need to inherit it on one X chromosome, being that they only have one. For females on the other hand, have two X chromosomes, and because of this, need to inherit the gene on both X chromosomes. This makes color blindness in females a lot rarer than in males (Mandal).
As one can see by this diagram, the mother has one color blind X chromosome, and is a carrier of the gene. Because only one parent is a carrier of the gene, there is 0% chance of a daughter being color blind in this particular case, although there is a chance for the daughter to be a carrier of the gene in future generations. There is a 50% chance that the son of the parents will be color blind, if they inherit the affected X chromosome ("Inherited Colour Vision Deficiency").
Although it is true a son can be color blind if there is one X chromosome affected by the color blind gene, this is only true if that one gene is from the mother. If the father is color blind but the mother is unaffected, none of the children from these parents can be color blind. This is because it impossible for a father to pass down their affected X chromosome to a son, bring that they would have to pass down a Y chromosome. If the parents do have a daughter, there will be 100% chance that these children will be carriers of the gene ("Inherited Colour Vision Deficiency").