http://www.eurekascience.com/ICanDoThat/index.htm
http://gslc.genetics.utah.edu/basic/howto/index.html
http://www.dnaftb.org/dnaftb/
http://vector.cshl.org/
http://www.pbs.org/wgbh/evolution/sex/index.html
http://www.biology.arizona.edu/human_bio/activities/blackett/introduction.html
http://www.biology.arizona.edu/human_bio/activities/blackett2/overview.html
http://gslc.genetics.utah.edu/students.html
http://gslc.genetics.utah.edu/