What are the chances of a person with color blindness passing it to their offspring?

X-linked Punnet squares use a capital letter (B) for a dominant gene and a lowercase letter (b) for a recessive gene.

In the following squares, a child with green letters is not affected and does not have colorblindness. Red means that the child is completely affected. Blue means that the child is a carrier, and can only happen with females.

Just to show you what a regular X-linked Punnet square looks like, this shows the possible offspring from a healthy male and healthy female. The male is on top, hence the "Y", and the female is on the left side. No lowercase letters are present, so nobody could have the disease.

This square shows the possible outcomes of an affected male and a healthy female. If a daughter is born, she will be a carrier 100% of the time. A son would not be affected.






This square shows an affected male and a carrier female. If a daughter is b orn, there is a 50% chance she will be a carrier and a 50% chance she will be affected. If a son is born, there is a fifty-fifty chance whether he will be affected or not.






This square shows a healthy male and a carrier female. A daughter born would either be a carrier or not be affected. A son born would have a fifty-fifty chance of being affected.






This square shows a healthy male and an affected female (this is rare). Any daughter born would be a carrier, while any son born would be affected.

This square shows an affected male and an affected female (this is rare). All children would be affected.