Washington State University
Washington State University: Learning Mendelian Genetics
A decent lab activity which could be used to introduce the concept of dominance and autosomal dominance. This site provides a coin toss activity to learn about Mendelian Genetics.
Concord Consortium
Biologica: Web Lab, Mendel's Peas
At this site see an online visual of meiosis, fertilization, and inheritance and play a game.