Many advances in genetics have had their greatest impact on our understanding of human health and disease. One of the most important areas of research is in the understanding of complex diseases, such as cancer and Alzheimer's disease, in which genes and environment interact to produce or prevent disease. Genetics devotes more than two dozen entries to both singlegene and complex genetic disorders, offering the latest understanding of
^Explore further in Gene, Polymerase Chain Reaction, and Eugenics
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