How is it that the genetically identical clone of a tortoiseshell cat turned out to be a gray-striped tabby? The answer lies in epigenetics. This program presents evidence that DNA is not necessarily destiny, and that diet, stress, and environmental exposures can all modify gene expression. With commentary from experts, detailed animations of cell mechanics, and examples from everyday life, Epigenetics succeeds in delivering an informative and entertaining explanation of how cell memory, methylation, and RNA interference cause these changes to occur. The video also examines the role of epigenetics in stem cell function, and the promising developments the field holds for treating cancer and neurological disease.

CIRC # 206. "Based on the original series, the Secret of Life, co-produced by WGBH/Boston and BBC-TV."