Unless you can present evidence to the contrary,I think I'll stick with Mendel on this one.(I think you just backed me up in the first paragraph you wrote,btw.) ball python dilemmas aside,let's stick with bull snakes,until I see evidence that calls for a plausible explanation,I'm going to go out on a sturdier limb,and take the Ockham's Razor approach. Unless two homozygous phenotypes were so visually similar that a double expressive individual could not be reasonably discerned ,(like two incompatable strains of T negative albinism,perhaps.) I don't know how anyone could jump to the conclusion that one proven recessive trait can be "canceled out" by breeding it to another proven recessive trait???it simply doesn't make good sense,and the two "hypos",(Stillwater & Trumbower) are phenotypically different enough from each other,that I doubt they are genetically identicle.(MHO)

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