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Oldest known sex chromosome emerged 248 million years ago in an octopus ancestor

www.livescience.com Oldest known sex chromosome emerged 248 million years ago in an octopus ancestor

The oldest-known sex chromosome emerged in octopus and squid between 455 million and 248 million years ago — 180 million years earlier than the previous record-holder, scientists have discovered.

Oldest known sex chromosome emerged 248 million years ago in an octopus ancestor
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