Which of the following would be evidence for a genetic basis for emotion? Co-workers tend to have similar feelings about their jobs. Co-workers tend to have similar feelings about their jobs. Hot temperatures are associated with aggression a nd violent crime. Hot temperatures are associated with aggression and violent crime. Studies have found similar levels of fearfulness among identical twins. Studies have found similar levels of fearfulness among identical twins. People who perform dangerous jobs, such as police officers and firefighters, are less intimidated by frightening situations than most people.