Catálogo de publicaciones - revistas

<jats:title>Mystery solved?</jats:title> <jats:p> Chromosomal sex determination arises when an autosomal locus acquires a sex-determining function. In some taxa, this process occurs often. The XY system in mammals, however, has been evolutionarily stable across a wide array of species. Fifty years ago, a variation on this norm was described in the creeping vole ( <jats:italic>Microtus oregoni</jats:italic> ), but the details have remained mostly unknown. Couger <jats:italic>et al.</jats:italic> sequenced the sex chromosomes in this species and found that the Y chromosome has been lost, the male-determining chromosome is a second X that is largely homologous to the female X, and both the maternally inherited and male-specific sex chromosomes carry vestiges of the ancestral Y. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article issue="6542" page="592" related-article-type="in-this-issue" vol="372">592</jats:related-article> </jats:p>