[or reverse it for axanthic heterozygous snow]

Albino heterozygous for axanthic = aab⁺ X Axanthic heterozygous albino= a⁺bb

The following are averages over a long period of time (out of a possible 16) you get:

4 double heterozygous for snow = a⁺b⁺
4 Axanthic heterozygous albino = a⁺bb
4 Albino heterozygous axanthic = aab⁺
4 Snows aabb