Question

dscribe a note on blood grouping system

Answer 1

The term human blood group systems is defined by International Society of Blood Transfusion as systems in the human species where cell-surface antigens—in particular, those on blood cells—are "controlled at a single gene locus or by two or more very closely linked homologous genes with little or no observable recombination between them",[1] and include the common ABO and Rh- (Rhesus) antigen systems, as well as many others; thirty-five major human systems are identified as of November 2014.[2]

In addition to the ABO and Rh systems, the antigens expressed on blood cell membrane surfaces include 346 red blood cell antigens and 33 platelet antigens, as defined serologically.[3][better source needed] The genetic basis for most of these antigens lie in 45 red blood cell and 6 platelet genes.[citation needed]An individual, for example, can be AB RhD positive, and at the same time M and N positive in the MNS system, K positive in the Kell system, and Lea or Leb positive in the Lewis system,[citation needed] where these and many of the systems are named for patients in whom the corresponding antibodies were first detected.

Answer 2

ABO blood grouping system, the blood grouping system based on the inherited red blood cells.
people may have type A, type B, type O and type AB blood.

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