Blood typing has been used to exonerate men in paternity cas

Blood typing has been used to exonerate men in paternity cases. Which blood groups was the father NOT in order for him to be exonerated?

1. There are four primary blood groups. The most common is blood type is \'O\", followed type \"A\", type \"B\", and type \"AB\"

2. Gene controls each blood type, contain different possible types of alleles.

3. There are three common blood type alleles, they are A,B and O. Among these three A and B alleles are codominat alleles while \'O\' is recessive.

4. We have two allele one is inherited from mother and another from father.

5. The possible combinations of three alleles are OO, AO, BO, AB, AA and BB.

6. Possible combination of allele in particular blood type are:

OO = blood type O AO = blood type A

BO = blood type B AB = blood type AB

AA = blood type A BB = blood type B

7. From the above information if mother\'s blood group is AB and blood group of child is A then the father\'s blood group would be A, B, AB or O.

8. If mother\'s blood groups is O and blood group of child is B, then the father\'s blood group would be B or AB.

9. If mother\'s blood group is A and blood group of child is AB, the the father\'s blood group would be B or AB

10. If mother\'s blood group is AB and child\'s blood group is O and vice versa father cannot be exonerated.