Human blood types are a good example of multiple allele genetics. Introduced terms to be used in blood typing. Transfusion, donor, recipient, antigen, antibody, agglutination, blood cells and plasma. Discuss how early blood transfusions were not very successful, resulting ion clots and death. Define and discuss the discovery of carbohydrate antigens on red blood cells which led to modern blood typing. Determine the antigen and antibody composition of all 4 major types of blood.