Fruit flies and selfish genetic elements (IMAGE) University of Rochester Caption Rochester researchers used fruit flies as model organisms to study Segregator Distorter (SD), a selfish genetic element that skews the rules of fair genetic transmission. Credit University of Rochester photo / J. Adam Fenster Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.