Blood ... Part 3 (Blood Type)

Four types of blood : A, B, AB, O.

The Universal Donor - a person with type O blood.
The Universal Receiver - a person with type AB blood.

Mixing two different blood types will resulted in fatal situation. The blood cells may begin to clum together in blood vessels.

Try out Blood Type Calculator to determin the possible blood type of a child, given the blood types of the biological parents and vice versa.

More information about Blood Type can be found here at Wikipedia.org