The genes we inherit from our mother & father determine our blood group.
Blood is explained by the type A, B, AB or O & the Rhesus (Rh) factor. The Rhesus factor is a protein which is either present or absent on the surface of our red blood cells. In medical this is indicated by a plus sign (+) or a minus sign (-). Best example, the blood type O+ means which the blood is type O & each blood cell has the Rhesus factor.
A blood group is recognized by a collection of inherited chemical substances (antigens) located on the surface of each red blood cell. The antigens, with the Rhesus factor, help the body to distinguish its own blood from the blood of another person.
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