what is epigenetics?

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Epigenetics is defined as the study of

  • Changes in gene expression which occur in organisms with differentiated cells, and the mitotic inheritance of given patterns of gene expression, and
  • Nuclear inheritance which is not based on changes in DNA sequence. (1)

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1. Holliday, Robin. “Epigenetics: A Historical Overview.” Epigenetics 1(2006): 76-80.