Neuroscientists Sam Wang and Sandra Aamodt have a guest post on Olivia Judson's NY Times blog discussing the complex interplay between genes and environment in the determination of personality traits. A taste:
So some of the effects that we call "genetic" (or "nature") are the
indirect result of people being drawn to particular environments
because of their personality. Or to put it another way, some
"environmental" (or "nurture") effects are actually attributable to
genetic tendencies.
It's worth noting that similar effects can occur for other traits: for instance, a genetic variant that…