http://biology.clc.uc.edu/courses/bio105/geneprob.htm

http://library.thinkquest.org/17109/game.htm

http://www.athro.com/evo/gen/punexam.html

http://www.zerobio.com/drag_gr11/mono.htm

http://glencoe.mcgraw-hill.com/sites/0078778066/student_view0/chapter5/math_practice.html