Our genetic code is set for life, but not all genes are working at all times. The epigenetic code turns genes on and off in response to our environment.
SOURCE: Randy Jirtle, dir., Epigenetics and Imprinting Lab., Duke Uni.; gene images copyright 2005 Nat. Academy of Sciences | By Bonnie Berkowitz and Todd Lindeman/Post ¿ Dec. 15, 2009
Emerging science aims to manipulate human DNA Article | Two mice. One weighs 20 grams and has brown fur. The other is a hefty 60 grams with yellow fur and is prone to diabetes and cancer. They're identical twins, with identical DNA.