How the fly selects its reproductive male (IMAGE) Université de Genève Caption Drosophila accessory glands consisting of two cell types (green "secondary cells" surrounded by red nuclei of the "main cells"). Credit © Robert Maeda Usage Restrictions None 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.