ep·i·ge·net·ics 
(ĕp′ĭ-jə-nĕtĭks)
(ĕp′ĭ-jə-nĕtĭks)n. (used with a sing. verb)
The study of heritable changes in gene expression that are caused by factors such as DNA methylation rather than by a change in the sequence of base pairs in DNA itself.
- straightforward
- straightforwardly
- straightforwardness
- straightforwards
- straight from the shoulder
- straight-from-the-shoulder
- straightjacket
- straightjacket
- straight-laced
- straight-laced
- straight-line
- straightly
- straight man
- straightness
- straight off
- straight-out
- straight poker
- straight razor
- straight shooter
- straight-shooting
- straight ticket
- straight up
- straightway
- strain
- strain