In other species: domestic cat , cattle , dog , goat , horse , pig , sheep , ducks , ass , macaques , great apes , chimpanzee , marsupials , Arabian camel , bighorn sheep , aurochs , mouflon

Mendelian trait/disorder: unknown

Considered a defect: yes

Cross-species summary: Each blood group system consists of a set of blood types, each of which corresponds to a particular antigen (usually a glycoprotein) on the surface of red blood cells. The different types within a system are the result of the action of different alleles at a locus that usually encodes an enzyme that catalyses the creation of the feature of the glycoprotein unique to that type, e.g. the presence of a particular sugar at the end of a short chain of sugars.