Blood Groups - Rhesus positive - ABO grouping

Blood Groups - Rhesus positive - ABO grouping blood group Genetics of the ABO System The ABO blood group system is controlled by a single gene on chromosome 9 There are three common alleles for the blood group A blood group test is used to determine the blood group of an individual There are four main blood groups

blood group Genetics of the ABO System The ABO blood group system is controlled by a single gene on chromosome 9 There are three common alleles for the

blood type Individuals with type A blood—without any prior exposure to incompatible blood—have preformed antibodies to the B antigen circulating in their blood plasma  As of December 2023, a total of 45 human blood group systems are recognized by the International Society of Blood Transfusion The two most important