THE HUMAN IMMUNE SYSTEM
TRANSFUSION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
2
|
|
|
5
|
|
|
13
|
|
|
4
|
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: -“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.
Detailed explanation-3: -Karl Landsteiner discovered the four blood groups.
Detailed explanation-4: -The ABO blood group antigens are encoded by one genetic locus, the ABO locus, which has three alternative (allelic) forms-A, B, and O. A child receives one of the three alleles from each parent, giving rise to six possible genotypes and four possible blood types (phenotypes).