What makes a rosy anery?

I was wondering what the criteria were for a rosy to be considered anery and whether this is a simple recessive trait or a phenotype achieved through selective breeding. All of the anerys I've seen display faint orange tones in the stripes which would seem to indicate to me that they are not truly anerytheristic. A true anery should also produce white snows when combined with the albino trait.

-Alice

Alice, just as in boa constrictor morphs, the anery gene when coupled with the albino gene do not produce snow white animals. Anerthyerism still has yellow pigment present which can be seen in the resulting brown tones of the anery borrego rosies and big boas. To produce a pure white snow you need an axanthic gene. This was was accomplished by Chad Dorton a few years back. Chad produced axanthic rosy boas from a pair of normal appearing Morongo Valley rosys many years back. below are some examples from my collection illustrating the significant differences.
A borrego anery with a whitewater abino and their resulting snow

A Morongo valley axanthic

The "snow white" snow resulting from this axanthic to a WW albino

Clearly it's the axanthic gene that is responsible for making what in my opinion is a true "snow" rosy boa.

I love that white snow! I was making the mistake of equating axanthic with anerythristic. Since the morongo strain axanthic produces white snows, wouldn't it be both axanthic and anerythristic (is there a separate term used when these traits co-occur)? Are there any characteristic of a borrego anery that would distinguish it from an animal without a lot of color?

-Alice

The Borrego anery has dark, almost black, eyes without brighter colors in it and a dark, fairly blue overall appearance when compared to a norm. I don't have any good photos, but if you look in this forum's posts from last year(9/9/05 & earlier) there are a bunch of pics posted by PCH(aka James Wilson). His website also has some good info & pic on it so check that site out too.