Quicksand is a bit over the top. Mud hole would be a better comparison.

I have published no papers on ball pythons. A couple of years ago I was coauthor on a paper on the genetics of zebra finches. http://papers.ssrn.com/sol3/papers.c...act_id=1746843

If someone asks how a car's internal combustion engine works, do you tell them that water goes in the front of the car and gas in the back and both go in the engine? While true, it gives the impression that water and gas mix in the engine, which is false.

"Codominant" in the link gets over the concept that two genes, A and a, produce three gene pairs, AA, Aa, and aa. Genotype AA produces phenotype 1, genotype Aa produces phenotype 2, and genotype aa produces phenotype 3. What else does a breeder need to know about codominance?