[or reverse it for axanthic]

Double heterozygous for snow = a⁺b⁺ X Albino = aa⁺⁺

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

4 Heterozygous albino = a⁺⁺⁺
4 Double heterozygous Snow = a⁺b⁺
4 Albino = aa⁺⁺
4 Albino heterozygous for axanthic = aab⁺