Fragile X (IMAGE) University of Wisconsin-Madison Caption Microscope images from the lab of Xinyu Zhao compare neurons with normal or mutated fragile X gene. With the mutation, mitochondria were shorter and failed to join together. A loss of fusion impairs the neuron's ability to communicate and plays a role in causing fragile X symptoms. Scale bar shows 10 microns. Credit Adapted from Zhao lab, Waisman Center, University of Wisconsin-Madison 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.