Question

ABO Blood group system

28 Jan 2026
Answer :
Word Count : 278
The ABO blood group system is one of the most important and well-studied human blood group systems, discovered by Karl Landsteiner in 1901. It is determined by the presence or absence of specific antigens on the surface of red blood cells, which are glycoproteins and glycolipids known as A and B antigens. The ABO system is controlled by a single gene, the ABO gene, located on chromosome 9, which has three main alleles: I^A, I^B, and i. The I^A allele codes for the A antigen, the I^B allele codes for the B antigen, and the i allele does not produce any antigen, resulting in type O blood. The combination of these
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