/newsroom/ en /newsroom/news/list/2025/06/11/the-monotreme-sex-gene-is-unlike-that-of-all-other-mammals Researchers from the ÐÓ°ÉÖ±²¥ of Adelaide, in collaboration with the ÐÓ°ÉÖ±²¥ of Melbourne, ÐÓ°ÉÖ±²¥ of Queensland and Monash ÐÓ°ÉÖ±²¥, 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