Depends on what species you are interested in.

For corn snakes, Serpwidgets' web site is the best. It also has a link to the Corn Snake Morph Guide. On the other hand, Serpwidgets' site is weak in several areas, including dominant mutant genes. Of course, all the common mutant genes in corn snakes are recessives.

As far as I know, there is nothing remotely comparable to the CSMG for any other herp.

For learning genetics, your best bet is Elrod and Stansfield's book, Schaum's Introduction to Genetics. It is hard to beat on price/quality. Used paperback copies of the 4th (2002) edition are going for around $8 now, and I like the problem oriented format.

The principles of genetics are the same for mice, maize, corn snakes, leopard geckos, etc. etc. Learn standard genetics first from a good text, and then learn the mutant genes in your species of choice. Most of the herper web sites with genetics pages range from misleading to downright dangerous to your mental health. For what it's worth, I learned genetics from a university course followed by several years working in the university genetics lab.

Hope this helps.

Paul Hollander
Serpwidgets' corn snake genetics tutorial

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