A snow is both albino and anerythristic. Both mutant genes are recessive to their normal counterparts. In other words, to be a snow, the boa must have a pair of albino mutant genes and a pair of anerythristic mutant genes. And each parent must have at least one of each mutant gene.

Male parent:
1. Looks normal but is heterozygous albino, heterozygous anerythristic
2. albino, heterozygous anerythristic
3. anerythristic, heterozygous albino
4. albino anerythristic (snow)

Female parent:
1. Looks normal but is heterozygous albino, heterozygous anerythristic
2. albino, heterozygous anerythristic
3. anerythristic, heterozygous albino
4. albino anerythristic (snow)

Select any male from the male list above and any female from the female list above. They could produce a snow. Any other mating could not produce a snow. An anerythristic that is not heterozygous albino cannot produce a snow in the first generation even if it is mated to a snow. However, if that anerythristic is mated to one of the snakes listed above, snows could turn up in the second generation.

Paul Hollander

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• Boa morphs? Co dom/ dom/ recessive? - gabonica2977, Mon Jan 23 16:52:40 2006
• RE: Boa morphs? Co dom/ dom/ recessive? - rainbowsrus, Mon Jan 23 18:02:05 2006
• Aztec and Leopard - DavidKendrick, Mon Jan 23 18:14:22 2006
• LOL, picking which one. "Betcha can't get just one" np - rainbowsrus, Mon Jan 23 18:24:39 2006
• RE: LOL, picking which one. "Betcha can't get just one" np - mdc, Mon Jan 23 18:29:26 2006
• RE: LOL, picking which one. "Betcha can't get just one" np - gabonica2977, Mon Jan 23 20:57:02 2006
• what does mean by "recessive" , "(co-)dominant" ? - kisekihuang, Tue Jan 24 06:38:47 2006
• RE: what does mean by "recessive" , "(co-)dominant" ? - rainbowsrus, Tue Jan 24 10:17:04 2006
• RE: what does mean by "recessive" , "(co-)dominant" ? - kisekihuang, Tue Jan 24 18:10:54 2006
• RE: what does mean by "recessive" , "(co-)dominant" ? - Paul Hollander, Wed Jan 25 10:05:45 2006
• THE List... - ChrisGilbert, Mon Jan 23 21:16:43 2006
• Thanks Chris.... - rainbowsrus, Tue Jan 24 01:06:33 2006