A colour blind child is born to a normal couple. Work out a cross to show how is it possible. Mention the sex of this child.

Explanation

Colourblindness is a X-linked recessive disorder which shows transmission from carrier female to male progeny and hence, usually males are affected and female remain carriers. If the given couple is normal with a colourblind child, their genotypes will be

Hence a colourblind male child is born to the given couple.