Question 54
Chromosomes, DNA and Sex LinkageWhich of the following diseases is commonly observed in human males and is sex-linked?
- A.Beriberi
- B.Down's syndrome
- C.Sickle-cell anaemia
- D.Colour blindness.
Show the answer and explanation
Answer: D (Colour blindness.)
Explanation
The gene for colour blindness is on the X chromosome, so males, with one X, show it more often.