From DNA to Diversity: Molecular Genetics and the Evolution of Animal Design. Sean B. Carroll, Jennifer K. Grenier, and Scott D. Weatherbee. Blackwell Science, Malden, Massachusetts. 2001. 214 pages. Paper $44.95.

In the late 1930s and early 1940s, a professionally disparate group of biologists forged an evolutionary synthesis that placed natural selection at the center of the changes in genes and in morphology that have produced the diversity of organisms in the biosphere. The chief architects of this famous synthesis included population geneticists, zoologists, botanists, and paleontologists, but not developmental biologists. Among the tenets of the synthesis was the finding...

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