02:58
Behind Closed Doors: Environmental and Genetic Links to Violent Behavior
Both the environment in which a child matures and his or her genetic nature contribute to aggressive behavior. Researchers studying a family in which male siblings all committed violent criminal acts found that the brothers shared a certain gene abn...
01:43
People to People: Biological Precursors to Violence and Aggression
Relations between people can be marked by aggression and violence, conditions that have both biological and psychological undertones. Jean Chen Chi has conducted experiments with the MAO-A gene that when missing in males results in aggressive behavi...