ANATOMY

Detailed explanation-1: -There are 4 main blood groups (types of blood) – A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each group can be either RhD positive or RhD negative, which means in total there are 8 blood groups.

Detailed explanation-2: -There are four major blood groups determined by the presence or absence of two antigens, A and B, on the surface of red blood cells.

Detailed explanation-3: -The gene that determines human ABO blood type is located on chromosome 9 (9q34. 1) and is called ABO glycosyltransferase.

Detailed explanation-4: -AB negative is the rarest of the eight main blood types-just 1% of our donors have it.

Detailed explanation-5: -O positive: 35% O negative: 13% A positive: 30% A negative: 8% B positive: 8% B negative: 2% AB positive: 2% AB negative: 1%