Data from: Sex-chromosome turnovers induced by deleterious mutation load

Olivier Blaser, Christine Grossen, Samuel Neuenschwander & Nicolas Perrin
In sharp contrast with mammals and birds, many cold-blooded vertebrates present homomorphic sex chromosomes. Empirical evidence supports a role for frequent turnovers, which replace non-recombining sex chromosomes before they have time to decay. Three main mechanisms have been proposed for such turnovers, relying either on neutral processes, sex-ratio selection, or intrinsic benefits of the new sex-determining genes (due e.g. to linkage with sexually antagonistic mutations). Here we suggest an additional mechanism, arising from the load...
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