Maintained by the Cold Spring Harbor Research Laboratory and the Josiah Macy, Jr. Foundation, this animated DNA primer (last mentioned in the February 19, 1999 Scout Report) now has three major sections -- Classical Genetics, Molecular Genetics, and Genetic Organization and Control. Each section covers several concepts by description and in animation, along with interviews and biographies of scientists, a quiz to test your understanding, and related Web links. This is a well-organized site with a lot of valuable information for high school and beyond.