An inherited feature on the surface of the red blood cells. A series of related blood types constitutes a blood group system, such as the Rh or ABO system. The frequencies of the ABO and Rh blood types vary from population to population. In the US, the most common type is O+ (meaning O in the ABO system and positive in the Rh system), which is pres [..]

The major human blood group system. The ABO type of a person depends on the presence or absence of two genes, A and B. These genes determine the configuration of the red blood cell surface. A person who has two A genes has red blood cells of type A. A person who has two B genes has red cells of type B. If the person has one A and one B gene, the re [..]

Complex chemical substances found on or in the surface of red cells that distinguish each blood group

n. a classification of blood based on the antigens present or absent in red blood cells. Although there may be 30 human blood group systems in all, there are four which are universally-recognized, nam [..]

Grouping of blood according to clotting and immunological features.

The way blood is classified by proteins (known as antigens) on the surface of your red blood cells. Group A blood has A antigens, group B blood has B antigens, group AB blood has both A and B antigens [..]

The major Human Blood type system which depends on the presence or absence of two Antigens A and B. Type O occurs when neither A nor B is present and AB when both are present. A and B are genetic fact [..]

this is how a person’s blood may be classified and the most common types are A,B, AB and O. Blood transfusion

An immunologically distinct, genetically determined class of human blood that is based on the presence or absence of certain red cell antigens and is clinically identified by characteristic agglutinat [..]

Complex chemical substances found on or in the surface of red cells that distinguish each blood group. The two more important blood group systems in transfusion work are the ABO and Rh systems.