Fruit flies under fluorescence. (IMAGE) University of Minnesota Caption Drosophila melanogaster under green and red fluorescence used as a marker to indicate the presence of inserted genes. Credit Camilla Sharkey Usage Restrictions With credit. License Licensed 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.