The Fruit Fly as a 'Living test tube' (IMAGE) Baylor College of Medicine Caption The fruit fly is a laboratory animal model that works as a 'living test tube' in which researchers can test the roles genes might play in human conditions. Credit S. Yamamoto/Baylor College of Medicine Usage Restrictions Credit: S. Yamamoto/Baylor College of Medicine 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.