Does Having An Extra Chomosome Promote Cancer? (image) Cold Spring Harbor Laboratory Share Print E-Mail Caption Surprising experimental results indicating that having one extra chromosome actually impedes cancer rather than promotes it led a team of researchers to reconsider the relation between incorrect chromosome number and oncogenesis. Credit CSHL Public Affairs Usage Restrictions None Share Print E-Mail 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.