Wing Discs of Drosophila (image) PLOS Caption In the wing discs of Drosophila species, the divergent activities of proneural enhancers (orange versus green nuclei) contribute to the evolution of the adult bristle patterns. Credit Image: Marcellini et al. Usage Restrictions Please cite the authors and PLoS Biology as the source. 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.