'Snow' morphs in snakes are usually the result of DH Albino x DH Anery. In cali kings, 'Snow' is the term "usually" for DH Albino x DH Melanistic. The breeding would result in patternless albinos basically. And those are referred to as Snows... and also as Blizzards.

I have one. She's nice.
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Mike
KingPin Reptiles Inc.
www.freewebs.com/mikesnake
www.captivebredforum.com