I followed the thread below, but thought it prudent to post my reply up here. The combination of two homozygous recessive traits in a single individual is just that: the combination of two (or however many the case may be) in a single individual. It is a phenomenon much different than co-dominance or incomplete dominance, since the expression of one trait does not have an effect on the expression of the other. For example, the homozygous expression of amelanism (we'll call it aa - the designation is really arbitrary) does not have an effect on the homozygous expression of axanthism (we'll call it xx). And animal displaying both traits would be aa AND xx, with the result being a "snow".

Here's a link to Vinny Lynch's website, where he has a pretty killer explanation of squamate genetics... and rightly so, since he's a geneticist... Anyway, it explains simple recessive traits, co-dominance, incomplete dominance, and multigenic traits in fairly plain language.

Natural Selection Reptiles

-Cole

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• Rextiles and others... - CBH, Wed Nov 17 09:01:58 2010
• Examples - CBH, Wed Nov 17 09:03:17 2010
• Lots of typos.... Sorry! NP - CBH, Wed Nov 17 09:08:15 2010
• I agree, Chris... - Sunherp, Wed Nov 17 17:23:50 2010
• RE: Rextiles and others... - Rextiles, Wed Nov 17 19:40:32 2010
• RE: Rextiles and others... - vjl4, Thu Nov 18 11:28:05 2010
• RE: Rextiles and others... - Rextiles, Thu Nov 18 13:38:09 2010
• RE: Rextiles and others... - Gregg_M_Madden, Thu Nov 18 19:48:57 2010
• RE: Rarely asked, not rearely... LOL.. - Gregg_M_Madden, Thu Nov 18 19:49:54 2010
• RE: Rextiles and others... - Rextiles, Fri Nov 19 12:45:36 2010
• RE: Rextiles and others... - vjl4, Fri Nov 19 14:02:52 2010
• RE: Rextiles and others... - Gregg_M_Madden, Fri Nov 19 15:03:01 2010
• Axanthic vs. Anerythristic - Sunherp, Fri Nov 19 16:41:37 2010
• RE: Axanthic vs. Anerythristic - Gregg_M_Madden, Fri Nov 19 16:59:36 2010
• RE: More.... - Gregg_M_Madden, Fri Nov 19 17:09:33 2010
• Erythrophores... - Sunherp, Mon Nov 22 10:54:00 2010
• RE: Erythrophores... - Rextiles, Mon Nov 22 12:15:28 2010
• More on genetics and Chromatophores - Sunherp, Mon Nov 22 11:21:18 2010
• Axanthics versus Anerythristics - Rextiles, Fri Nov 19 18:07:09 2010