Linked from
The 19 pages that link to ABO blood group system, each with the reason it gives.
Blood donationBroader topic: ABO compatibility is central to safe red-cell transfusion.
CodominanceBroader topic: In type AB, A and B alleles are both expressed as red-cell antigens.
GlycolipidBroader topic: ABO antigens can be displayed on glycolipids as well as glycoproteins.
GalactoseRelated: Galactose is part of the B antigen’s terminal sugar structure.
Dominant traitBroader topic: A and B alleles are codominant, while each is dominant over O.
Hh blood groupRelated: A and B antigens are formed by modifying H antigen.