I've been trying to absorb the theories behind the recessive traits of T.Radix. Anerythristic and Axanthic seem to be well proven as far as sharing a similar recessive spot on the DNA's and such.
However, there does exist some confusion on the genetics behind them when Snows and Blizzards come into play. Maybe it's not so confusing? Maybe I'm completely wrong?
I want to put together some writing and perhaps some silly punnett squares that are up-to-date with what we understand currently.

I found an example on human eye color that might explain how "Axanthic" and "Anery" work together. OF COURSE they're not the same, but the concept may be similar.
"In genetics lingo, we say that brown is dominant over blue and green. And that green is recessive to brown but dominant over blue. Blue is recessive to both."
Understanding Genetics

But IDK, it seems this idea goes backwards when I think about Snow VS Blizzard.

The only other idea I have is to look at examples of how fur colors in Siamese cats vary. Like black/brown dilutes with blue, white, gray, tan, blah blah blah. Perhaps understanding something along those lines might include explanations for the Black & White Axanthics.

Everything in science is a theory until a better idea comes along.