Yokohama City University Jun 5 2026 The study, published in Volume 153, Issue 9 of the journal Development on May 14, 2026, by The Company of Biologists, is the first to precisely map endogenous UTY occupancy across the human genome and demonstrate that UTY remains functionally involved in transcriptional regulation during early human development. The human Y chromosome has lost many of its ancestral genes over millions of years of evolution. Yet a small number of genes, including UTY , have