The question of epigenetics is: Can the environment re-program your genes? If the genome is the keyboard of a piano, then the epigenome is the fingers playing those keys. Recently, it has become clear that the environment can alter these epigenetic modifications and, more surprisingly, these modifications can sometimes be inherited. In this presentation, Lisa Sardinia discusses the mechanism of epigenetic modification, as well as some newly discovered environmental effects on epigenetic modifications. Lisa Sardinia is an associate professor in the Department of Biology at Pacific University. She teaches Molecular Biology, Microbiology, Basic Science for Optometry, and Genetics for Physician Assistant students.