Reading the Dark Heart of Chromosomes (IMAGE) PLOS Caption Drosophila melanogaster chromosomes. DNA is shown in gray and the centromeres in green. Credit Ankita Chavan (Mellone lab) Usage Restrictions CC-BY: Redistribution allowed 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.