Fruit Fly Testis (image) Rockefeller University Share Print E-Mail Caption Developing sperm, in blue, within a fruit fly testis. Credit Laboratory of Evolutionary Genetics and Genomics at The Rockefeller University Usage Restrictions Image may only be used to illustrate research described in the accompanying release. 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.