Originally Posted by
brenda.clark
I think it's often a mistake to get bogged down into whether a trait is genetic or environmental. As a biologist in a past life, I know that every trait is a combination of the two. You can't have behavior without a genetic component involved in the formation of the brain structures. To a certain degree the structures are "hard coded" by genetics. When we commonly talk about a trait being genetic, we are often thinking about hard coded traits like eye color. However when it comes to behavior, the real question is the degree of plasticity of the brain in response to the environment. The degree of plasticity and the range of potential behavior is genetic, but there is a huge component of environment which plays into any complex behavior. So it's not either one or the other but a combination of the two. There may or may not be a gene or constellation of genes associated with CD behavior, but that's not the end of the analysis.
My 2 cents FWIW.