Courtship of the Flies (IMAGE) Brown University Caption The male fruit fly approaches the female (A), tracks her (B), and extends a wing (C) to produce a species-specific song. He curls his abdomen a full 180-degrees (D). If the female is receptive, they mate. The doublesex and fruitless genes help determine this courtship behavior. Credit Lynn Ditch Usage Restrictions Must credit if the image is used. 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.