Or, this is another way of looking at it. Below a quote from vin Russos book, which discusses incomplete dominance. This also would appear to explain many of the things we are seeing with the Extremes. Things like visual indicators, which could explian the tricolor and Anery that Don has. The super form, which could be Terry M's animal when bred to a triple het would produce an entire cluch of homozygous or visually heterozygous animals.



"Incomplete Dominance

For many years, re[tilesbreeders have erroneously used the term "co-dominant" when in reality they are referring to incomplete dominance. Incomplete dominance is similar to a recessive trait, in that the heterozygous offspring are gene carriers for a specific trait. However, in breeding scenarios where incomplete domonance is involved the heterozygous animals have a visual indicator and therefore are referred to as "visually heterozygous." This means the offspring exhibit another type of color or pattern that is halfway between the normal appearance and the "super" or more exaggerated dominant form. So if you breed boas to each other that have an incomplete dominant trait and that are visually heterozygous for an extreme trait, you will have a one-in-four chance of producing the super exgaggerated form which will be dominant. When this boa is then bred to a normal, all of the litter will be visually heterozygous offspring. And finally, if you breed these visual hets to a normal you will get 50% visual hets and 50% normal appearing boas."(Vincent Russo, The Complete Boa Constrictor;ECO Publishing,2007)

[ Show Entire Thread ]