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In 1974, Richard Lewontin published The Genetic Basis of Evolutionary Change, focusing enormous attention on protein variation as both a model of underlying genetic variation and a level of selection itself. In the twenty years since, scientific research has been shifted by the power of molecular biological techniques to explore the nature of variation directly at the DNA and gene levels. The "protein chapter" is coming to a close. In this book, Jeff Mitton explains the questions that geneticists hoped to answer by studying protein variation. He reviews the extensive literature on...

In 1974, Richard Lewontin published The Genetic Basis of Evolutionary Change, focusing enormous attention on protein variation as both a model of underlying genetic variation and a level of selection itself. In the twenty years since, scientific research has been shifted by the power of molecular biological techniques to explore the nature of variation directly at the DNA and gene levels. The "protein chapter" is coming to a close. In this book, Jeff Mitton explains the questions that geneticists hoped to answer by studying protein variation. He reviews the extensive literature on...

Because they prey upon a wide variety of conifers, bark beetles have a major impact upon western forests. In most of the western states, for example, we have witnessed bark beetles in epidemic outbreaks, attacking and damaging ponderosa pine, limber pine, and other hosts.

The ecosystem of bark beetle and host tree is a highly coevolved community of organisms in which the evolution of one member of the community significantly influences the evolution of the other. Largely because of the enormous economic impact these insects exert on the management of our forests, few other such...