Articles
5 articles on Ancient Matches, ancient-DNA research written up for readers who want the evidence, not just the headline.
An ancient match is a stretch of DNA a living file shares with a sequenced individual who died hundreds or thousands of years ago. Because ancient genomes are low-coverage and the generations separating a living person from them are many, such sharing is identity by state, not identity by descent: it measures resemblance at the markers compared, and a shared segment is never proof of descent. Read that way, the matches are a useful lens on which ancient populations a genome resembles.
The articles explain what it means to share DNA with an ancient person and what the centimorgan figures on such a match mean, what a Viking, Celtic or Anglo-Saxon DNA test can and cannot show, and how a whole-genome sequencing VCF from tellmeGen, Dante Labs or Nebula is converted to the panel's markers at upload and what changes versus a chip export.
What the Ancient Matches service includes
The 2022 genomes put continental North Sea ancestry at about three quarters of early medieval eastern England and a quarter to half of the English today. What that looks like in a modern genome, why it blurs with Danish Viking input, and how a qpAdm model and Ancient Matches measure it.
Celtic names a language family and two material cultures, not a genetic population. What Iron Age genomes from Britain, Ireland and Gaul actually show, why the Celtic nations differ from each other, what R-L21 does and does not mean, and what a real analysis can measure.
There is no Viking percentage, because Viking was an occupation and the Viking Age population was mixed. What a DNA test can honestly measure: resemblance to published Viking Age individuals, qpAdm models with Scandinavian sources, and shared segments with the people themselves.
How to run an ancient-DNA ancestry analysis from a whole-genome sequencing VCF — tellmeGen, Dante Labs, Nebula and similar — what happens to the file at upload, why it is converted to the panel's markers, and what changes versus a chip export.
What it means to share a stretch of DNA with a person who died thousands of years ago, why such matches are identity by state rather than identity by descent, what the centimorgan figures mean, and why a shared segment is never proof of descent.