Nice bettas
Bettas are cool....with several interesting genetic traits.....A good book on Bettas is
Bettas by Robert J. Goldstein published by Barron's (ISBN 0-7641-1653-3)...has a great section on betta genetics.
I've been thinking about designing an assignment for my students where they must pick a pet or organism with a couple of known simple genetic (Mendelian) traits. They have to do a powerpoint or poster on the inheritance of those traits and present it to the class.
Cornsnake, ball pythons, bettas, cats, dogs, what other critters do people think would be useful or fun to suggest?