epigenetics n. the study of how environmental factors can change gene function without altering DNA. (source: Double-Tongued Dictionary)
Further reading
Gene calls from the Badlands of South Dakota to ask about ordering a glass of water at a restaurant by asking for a blue dolphin neat. Is that widely used? There are many slang terms used when ordering water, such as windmill cocktail, city coke...
Sean in New York City is curious about the expression the business end, as in the business end of a gun. It’s simply “the end of an object that fulfills its function or purpose,” such as the business end of a shovel, the business...