Genes
This will depend on a number of factors. If one is not keen on blood, anything surgical is out but there are other options such as social work that help people too.
Blood AB.
This will depend on a number of factors. If one is not keen on blood, anything surgical is out but there are other options such as social work that help people too.
They can have a lot of blood-types
blood types a+ and o_
Blood type A can receive a transfusion from blood types A and AB.
It depends if you are A pos or A neg. If you are A pos, you can receive A pos, A neg, O pos, and O neg. If you are A neg, you can receive A neg, or O neg. The reason for this is that if you are A neg and receive Rh positive blood, it is possible you may develop an Anti-D antibody (Rh antibody)which would cause you to have a reaction to further transfusion of Rh positive units.
blood
I believe all of the do EXCEPT for type O. that is why type O is the universal donator. the other bloodtypes have receptor proteins that can call out invading blood types that don't match by the receptors of the different blood. This results in the body attempting to reject and fight the invading blood. it can lead to death. Type O doesn't have receptors so the host blood type cant detect it. there is no rejection.
I believe type O blood is the one blood type that can be matched to any of the other blood types. There is one type of blood, though, that is not compatible with type O blood. However, that is very rare.
There are negative and positive of A, B, AB, and O. That means that there are 8 different blood types. Your blood type is determined based upon your mother and fathers blood types. O negative is the rarest blood type.
There are many good books on blood types. The book "Blood Types" is a simple one to start with. It lists all blood types and what the different types mean.