Compared with women, men suffer more from colour blindness because –
- AThey pass more through mental tensions
- BThey live out of home relatively more
- CThey have only one X-chromosome
- DCommonly they have less fat
Show answer and explanation
Correct answer: (c) They have only one X-chromosome
Explanation
The gene for colour blindness is recessive and lies on the X chromosome. Women have two X chromosomes, so a normal gene on one usually covers for the faulty one, and they are only carriers.
Men have only one X chromosome (XY), so a single faulty gene makes them colour-blind.