Short-tailed Mouse Xray (IMAGE) Cell Press Caption This image shows a mouse embryo (cartilage in blue, bone in red) in which Hoxb13 was overexpressed, with only a few tail vertebrae (approximately 9) and an unusually short tail. Credit Aires et al. - <i>Developmental Cell</i> Usage Restrictions Credit Required. 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.