<i>Drosophila</i> Wing (IMAGE) University of Basel Caption Drosophila wing size control depends on the spreading of the Dpp morphogen. Credit University of Basel, Biozentrum Usage Restrictions Give adequate 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.