For a long time, researchers proposed genetic influence for the behavioral trademarks of serial killers; in particular serial killers' elevated levels of aggression and anti-social behavior. Due to this, researchers conducted surveys investigating men with abnormal sex chromosomes and their criminal activity, with the majority of these surveys taking place in maximum security institutions. The results of many of the surveys were an association of an extra Y chromosomes with tallness and anti-social behavior. However, many of these surveys were not controlled for, thus readers should take strong discretion when analysing the data. This is a presentation of the reports of the earliest to the present day findings of the relationship between abnormal sex chromosomes and criminality in men.

Human chromosomes

Normal male genome


Return to homepage