EVERYDAY SCIENCE

Detailed explanation-1: -Each daughter has a 50% chance of being a carrier and each son has a 50% chance of being color blind.

Detailed explanation-2: -If the mother carries the gene but is not color blind, there is a 50% chance that her sons will be color blind and a 50% chance that her daughters will carry the gene. When a color blind father and a mother who carries the color blind gene have children, there is a 50% chance that their sons will be color blind.

Detailed explanation-3: -Conditions like color blindness are passed from parents to their children on groups of genes called chromosomes. Some of these, called X and Y chromosomes, determine if you are male or female at birth. Males have 1 X chromosome and 1 Y chromosome, and females have 2 X chromosomes.

Detailed explanation-4: -It’s estimated that up to eight per cent of boys have some degree of colour blindness (also known as colour vision deficiency or CVD), whereas less than one per cent of girls do. That’s about one in 12 boys, and around one in 200 girls. What causes colour blindness?

Detailed explanation-5: -A red/green colour blind boy can’t receive a colour blind ‘gene’ from his father, even if his father is colour blind, because his father can only pass an X chromosome to his daughters.