Researchers have found evidence of a super rare genetic condition that gives men an extra X chromosome, reporting the oldest clinical case of Klinefelter Syndrome to date.
Klinefelter syndrome was only diagnosed for the first time in 1942 but now a Portuguese skeleton from the 11th-century AD has been found with the same genetic signature.
A group of international researchers has uncovered evidence of a super rare genetic condition that gives men an extra X chromosome, reporting the oldest clinical case of Klinefelter syndrome to date. The evidence comes from a 1,000-year-old.
DNA extracted from the 1,000-year-old skeleton reveals the man had Klinefelter syndrome, which is a super rare genetic condition that gives men and extra X chromosome.