Check out this Mendelian Genetics reference site, which has an enormous catalogue of links. It doesn't just talk about Punnett Squares, there's also a link to a simple introduction to the chi square test.
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John Wilkins over at Evolving Thoughts has posted an excellent brief summary of the history of the eugenics movement.
A big thank you for the folks who contributed to our little portion of that wonder of a wonder, the scienceblogs.com DonorsChoose challenge. The SCQ also recieved a number of stellar Haiku's which will be used in the Haiku Phylogeny project.
The wonderful Project Gutenberg has just released a fully HTMLised version of R. C.
Many people have been revisiting old posts so that new readers could get a "taste" of their blog. Below are some representative posts which span my varied interests....