
"Discovery of Prehistoric Individual with Absent X Chromosomes from Ancient DNA Analysis"
Researchers have identified the earliest known cases of two genetic disorders, Turner syndrome and Jacob's syndrome, in prehistoric individuals using a new technique to measure the number of chromosomes in ancient DNA. The study also revealed three people with Klinefelter syndrome and an infant with Down syndrome from different time periods. This method could provide insights into how perceptions of gender identity have evolved over time and may be applied to analyze incomplete ancient DNA in archaeological remains.
