Current Biology
Volume 23, Issue 18, 23 September 2013, Pages R848-R850
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Evolution: From Autosomes to Sex Chromosomes — and Back

https://doi.org/10.1016/j.cub.2013.08.021Get rights and content
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Summary

Heteromorphic sex chromosomes are thought to represent a terminal evolutionary endpoint due to their specialized gene content and chromosome-specific regulation. New findings, however, show that an ancient X chromosome reverted to an autosome in the lineage leading to Drosophila.

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