BETTA GENETICS:
This is the shortest page on my site because all it has are links to the two best sites for learning about the genetics of betta colors. They say everything I could say, do it more clearly, and have a host of pictures to exemplify genetic traits.
I recommend starting with Betta Genetics at: http://www.geocities.com/dynarb/genetics.html. This is a page on the Betta Bunnies site, maintained by Dynarb and he does an excellent job of explaining the nomenclature and mathematics of genetics.
(Click
on Bettas to return to the main
betta page or on main site
to browse 70 topics ranging from exotic kaleidoscope designs to the
strange world of lucid dreaming.)