Carinata
Ever Evolving Exotics
Bloodred still uses one particular recessive gene to produce the trait, something that does not occur with the ratsnakes you mentioned. The reason why old school bloods were truly deserving of the bloodred name is because they were linebred so extensively and narrowly. They became "purebred" in a way, and outcrossing to other corns to make "mutts" is what reintroduced vigor in the gene pool, because it was now broader.
Very true. But they are outcrossed as well. The gene could have come from a glades or from the corn. If you breed certain albinos of X species to another albino of Y species. You may get normals becasue they genes are not compatible.