When a colour-blind man marries a carrier woman. What is the probability of their offspring being colour blind?

Answer Details

Color blindness is a genetic condition that is usually passed down from a parent to their child. It occurs when there is an issue with the genes that determine the colors that the eyes can see. Typically, the genes for color vision are located on the X chromosome. Since men have only one X chromosome, they are more likely to be color blind than women, who have two X chromosomes. In this scenario, a color-blind man has married a woman who is a carrier of the color blindness gene. This means that she has one normal X chromosome and one X chromosome with the color blindness gene. Each of their children has a 50% chance of inheriting the color blindness gene from their mother. If a child inherits the gene, whether they are male or female, they will have some form of color blindness. If the child does not inherit the gene, they will not have color blindness. Therefore, the probability of their offspring being color-blind is not 0% because the man is already color-blind, but it is also not 100% because the woman is only a carrier and has one normal X chromosome. The correct answer is 50%.