NYU psychologist Marcus strikes a rare and delicate balance of scientific detail and layperson accessibility in this overview of an exploding field of inquiry. He traces a compelling story through the classic genetics and brain experiments of the past century up to present-day research, intriguingly illustrating how the human genome is intertwined with brain development, showing how the mechanisms that build brains are extensions of the mechanisms that build the body. Marcus dispels popular misconceptions of genes, showing, for instance, that most behaviors and disorders are much more complicated than headlines such as "gene for obesity discovered" would have us believe. Heavy explanations of complex results and abstract concepts are leavened by Marcus' upbeat, friendly writing style, which makes even the most arcane genetics principles a joy to read. Experiments with vision and language are particularly well-represented, with vivid descriptions adding color to the technical prose. If there is a fault here, it is that the book jumps around a bit too much, attempting to collect several decades of research and many threads of thought into a single slim volume. A lengthy glossary and bibliography, along with meticulous footnoting throughout, are helpful for those wishing to educate themselves further on the subject, but Marcus gives most readers more than enough to think about here.
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