Light Microscopy Image of a Live Drosophila (image) University of Bonn Share Print E-Mail Caption This Drosophila was unable to produce enough growth factor idgf6 due to a genetic modification. As a result, defects can be seen in the respiratory organ as well as in the chitinous shell. Credit Photo: Dr. Matthias Behr Usage Restrictions This photo may be used with the press 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.