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Evolution: The Theory of Natural Selection (Part 1)
These pages are part of a site called Evolution that accompany a textbook by the same name. Mark Ridley is the author. This section has an advanced discussion of determining allele and genotype frequencies using the Hardy-Weinberg ratio.
McGraw Hill
Glencoe Biology: Meiosis: Self Check Quiz
Try this five question, self-checking quiz over the process of meiosis.