Khan Academy
Khan Academy: Mendelian Genetics Questions
This is a ten-question quiz pertaining to Mendelian genetics.
Khan Academy
Khan Academy: Natural Selection in Populations
How natural selection works at the level of genes, alleles, genotypes, & phenotypes.
Other
Biology Simulations: Heredity I: Eye Color and Tails
This simulation can be used to test the heredity of two traits; eye color and the presence of a tail.