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defined:
An increase in the number of copies of any particular piece of DNA. A tumor cell amplifies, or copies, DNA segments naturally as a result of cell signals and sometimes environmental events.
explained:
Listen to a detailed explanation. Dr. Lawrence Brody, of the National Human Genome Research Institute's Genetic and Molecular Biology Branch, defines gene amplification.
relatedterms:
cell, deoxyribonucleic acid (DNA), gene, oncogene
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