Dosage compensation and meiotic sex chromosome inactivation are maintained under relaxed selection. - Parker DJ; Dumas Z; Gómez R; Aury JM; Labedan M; Tran Van P; Istace B; Cruaud C; Labadie K; Noel B; Freitas S; Djordjevic J; et al. (Proceedings of the National Academy of Sciences of the United States of America, 2026)