Blood typing is often used as evidence in paternity cases in

Blood typing is often used as evidence in paternity cases in court. In one case, the mother had blood type B and the child had blood type O. Which of the following blood types could the father NOT have?

KEY CROSS PUNNETT ANSWER

Solution

Answer: Father cannot have AB blood group

Genotype of Mother = BO

Genotype of the Baby = OO

Father must have an O allele = OO, AO or BO but not AB