Quote Originally Posted by OhhWatALoser View Post
Calling it co-dominant violates the make it 100% factually and visually correct philosophy.
100% correctness is impossible in this area because the textbooks do not agree on the definitions of "codominance" and "incomplete dominance". As the breeding results are the same for both, the simplest practical solution for breeders is to lump them together. "Codominant" has the fewest letters of the greater than a dozen possible available terms. This is the solution that the professional mouse geneticists have adopted, but they use the term "semidominant".