Question

Which of the following causes colour blindness?

• A. Dominant gene in woman
• B. Dominant gene in man
• C. Recessive gene in man
• D. Recessive gene in woman

Answer 1

Answer: (C)

Recessive gene in man

Recessive genes cause colour blindness. In woman if one recessive gene and one dominant gene are present, the lady will be a carrier. It is because human females have two X chromosomes. Whereas, if human male contains a recessive gene that man will have colour blindness.