- Colour blindness, also known as colour vision deficiency, is a genetic condition characterised by the inability to perceive certain colours accurately.
- Colour blindness is an X-linked recessive genetic disorder, most commonly affecting males.
1. Inheritance:
- Colour blindness is usually inherited as an X-linked recessive trait.
- The genes responsible for colour vision are located on the X chromosome.
- Males are more commonly affected than females because they have only one X chromosome (XY).
- Males with the recessive allele on their single X chromosome will exhibit colour blindness.
- Females can be carriers of the trait if they have one normal X chromosome and one with the recessive allele.
- A female needs two copies of the recessive allele (homozygous) to be colour blind.