A colour blind girl can be born when

A colour blind daughter is born when

Colour blindness is rare in females due to its defective gene being sex linked. A colour blind girl is born will be only when :

A colour blind son will born when

A colour blind daughter is born in case of

A colour blind daughter is born in case of

A colour blind girl is rare because she will be only when :

A colourblind girl is rare and can be born when

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.

Colour blindness is