Which of the following is an example of a sex‑linked trait in humans?

Question

Accepted Answer

Answer: Colour blindness is a classic X‑linked recessive trait in humans. Explanation: The gene responsible is located on the X chromosome. Males (XY) who inherit the defective allele on their single X chromosome express the condition, while females (XX) need two copies to be affected. Other options like cystic fibrosis and sickle‑cell anaemia are autosomal recessive, not sex‑linked.

Heredity

❓ Sibling Questions in this Chapter