Research has been conducted since the 70’s and with twins at that time both fraternal and identical that providing an avenue to study genetics and behavior (sorry about my reference to my twins and I just wanted to supply observations that many people do not have since they do not have twins-my mistake) and those studies found links between genes and behavior. Now we have available large genetic genetic data bases ( FTDNA 23 andMe etc). to test this in a different way. These analysesSigh? Very insightful and informative. Definitely inclines me to be intimidated into accepting information from the source because it's an indicator they must seriously mean it and I must be too dim to understand.
Actually I was responding to your comments regarding what someone else learned in grad school being incorrect and your frequent anecdotal citations of how things with your fraternal twins bear out scientific data you suggest supports ideas you agree with. Smart scientists understand that it's common for data to suggest strong support for an idea -- while recognizing that it may be valid and correct data and simultaneously not be the global answer it appears at first blush.
Have supported the twin studies and have even located specific genes that correlate with personality traits. It isn’t that I thought you couldn’t understand but this is a topic that some people have deep beliefs about and will never ever change their beliefs.