The gene coding for these traits has many allelic forms at the I locus, making these an example of co-dominant inheritance.
The XK gene determines one of these named after Kell. They are defined by how glyco·syl·transfer·ases modify substance H, and they are tested for in the Coombs test. Their incompatibilities can cause alloimmunity in erythro·blastosis fetalis. The gene coding for these traits has many allelic forms at the I locus, making these an example of co-dominant inheritance. Cross-matching of these traits is performed by adding an antibody serum and checking for agglutination. Also classified as Rh+ or Rh-, for 10 points, name this trait classified as A, B, AB, or O.
The XK gene determines one of these named after Kell. They are defined by how glyco·syl·transfer·ases modify substance H, and they are tested for in the Coombs test.
{blood types} or {blood groups} [prompt on {red blood cell antigens}, or {blood serum antibodies}]