Question

Give scientific reasons : Colour blindness is more common in men than in women.

Answer 1

Colour blindness is an X-linked disorder caused by a recessive gene. Males have only one ‘X’ chromosome and thus have only one copy of the gene which if recessive may lead to colour blindness. However, females have two ‘X’ chromosomes and both should possess the recessive gene for her to become colourblind, which occurs rarely.