Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
epigenetic and genetic cascade of events (arrows) from a stem cell state to a differentiated adult state involved in development. A normal or environmentally modified state promotes genome alterations associated with an increase susceptibility for disease and phenotypic variation. The critical window of early development is when environmental factors have the ability to alter the epigenome (modified from [ 71 ])
