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Distinguished Professor of Genetics, University of California, Riverside
Transposable elements sequences of DNA with a penchant for wandering around in plants and animals make up 50 percent of the human genome. Yet much remains unknown or misunderstood about them, especially how they lead to diversity by creating mutation and variation. Dr. Wessler describes how these fascinating voyagers help turn the genome into a battleground where random changes can lead to "unintelligent," but always interesting, design.