Why blood types many not be a great method of determining which baby belongs to which parent?

explain pleaseWhy blood types many not be a great method of determining which baby belongs to which parent?
I'm going to assume that you allready know how blood types work (A %26amp; B are co-dominant and O is recessive)





Paternity testing using blood types only works in certain situations. For example; if the baby is type O and the dad is type AB there is no way the child can be his because in order for the child to be O it would have had to have inherited an O from dad, but daddy didn't have one.


On the other hand if the baby was type A and dad was type AB, the baby could be his, but there is no way to know for sure, lots of people have type A or type AB blood.





Bottom line: the only thing that blood typing can do is eliminate potential fathers in some situations, it really can't confirm with certainty who is the father, only DNA testing can do that.