/newsroom/ en /newsroom/news/list/2025/06/11/the-monotreme-sex-gene-is-unlike-that-of-all-other-mammals Researchers from the University of ÐÂÀ˲ÊƱ, in collaboration with the University of Melbourne, University of Queensland and Monash University, have discovered that the genetic mechanism that determines sex in monotremes is different from all other mammals. June 11 2025 Johnny von Einem /newsroom/news/list/2025/06/11/the-monotreme-sex-gene-is-unlike-that-of-all-other-mammals /newsroom/news/list/2024/07/23/monotremes-are-unique-inside-and-out The identification of a key gene in monotremes has increased our understanding of why the stomachs of platypuses and echidnas are atypically small, non-acidic, and, in the instance of platypuses, lack a pyloric sphincter. July 23 2024 Johnny von Einem /newsroom/news/list/2024/07/23/monotremes-are-unique-inside-and-out