A normal couple (not suffering from colour blindness) has a colour blind child. What are the possible genotypes of the couple?

A normal couple (not suffering from colour blindness) has a colour bli

1.	A normal couple (not suffering from colour blindness) has a colour blind child. What are the possible genotypes of the couple?
Answer» A normal couple (not suffering from colour blindness) has a colour blind child. What are the possible genotypes of the couple?