Two Brother Mice (image) Université de Genève Share Print E-Mail Caption These are two brother mice pups from the same litter. The one carrying a mutated Hoxd3 gene is on the left. Credit © UNIGE Usage Restrictions None Share Print E-Mail 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.