THE HUMAN IMMUNE SYSTEM
BLOOD GROUPS
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[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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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: -Genetics of the ABO System With three alleles, there are six possible genotypes for ABO blood group. Alleles IA and IB, however, are both dominant to allele i and codominant to each other. This results in just four possible phenotypes (blood types) for the ABO system.
Detailed explanation-3: -Karl Landsteiner has been credited for the discovery of ABO blood group system in 1900. [1] His extensive research on serology based on simple but strong scientific reasoning led to identification of major blood groups such as O, A, and B types, compatibility testing, and subsequent transfusion practices.
Detailed explanation-4: -“These different blood types evolved as a result of genetic mutations, but what caused certain blood types to be more successful is likely exposure to infectious diseases or other environmental pressures, ” Fyfe-Johnson said. The kinds of blood types that survive infections are often the ones that outlive the others.