The degree of divergence between the sex chromosomes is not always proportional to their
age. In poeciliids, four closely related species all exhibit a male heterogametic sex …

In this editorial letter, we summarize the current challenges in the field of sex chromosome
evolution and introduce the 17 manuscripts which together provide insights into the diversity …

Sex chromosomes have evolved frequently across the tree of life, and have been a source of
fascination for decades due to their unique evolutionary trajectories. They are hypothesised …

Sex chromosome replacement is frequent in many vertebrate clades, including fish, frogs,
and lizards. In order to understand the mechanisms responsible for sex chromosome …

Fast‐X evolution has been observed in a range of heteromorphic sex chromosomes.
However, it remains unclear how early in the process of sex chromosome differentiation the …

Advances in genome sequencing have greatly accelerated the identification of sex
chromosomes in a variety of species. Many of these species have experienced structural …

Occam's Razor is a philosophical guide that recommends that the simplest possible
explanation should be concluded when confronted with multiple plausible scenarios. In …

Sex determining loci have been described on at least 12 of 22 chromosomes in East African
cichlid fishes, indicating a high rate of sex chromosome turnover. To better understand the …

Although homomorphic sex chromosomes can have non-recombining regions with elevated
sequence divergence between its complements, such divergence signals can be difficult to …

Sex chromosomes of teleost fishes often have low levels of differentiation and undergo
frequent turnovers. Annual Nothobranchius killifishes comprise representatives with male …