Which of the following human conditions is inherited as an X linked recessive trait?
- A. Red green colour blindness
- B. Sickle cell anaemia
- C. Down syndrome
- D. Albinism
Explanation
The genes for red and green pigments lie on the X chromosome, so colour blindness follows the X linked pattern. Sickle cell anaemia and albinism are autosomal recessive, and Down syndrome is a chromosome number disorder, not a single gene trait.
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