Ancient Cro-Magnon DNA Shows Genetic Continuity with Modern Europeans
Author Information
Author(s): Caramelli David, Milani Lucio, Vai Stefania, Modi Alessandra, Pecchioli Elena, Girardi Matteo, Pilli Elena, Lari Martina, Lippi Barbara, Ronchitelli Annamaria, Mallegni Francesco, Casoli Antonella, Bertorelle Giorgio, Barbujani Guido
Primary Institution: Dipartimento di Biologia Evoluzionistica, Università di Firenze, Firenze, Italy
Hypothesis
Can the mitochondrial DNA of a 28,000-year-old Cro-Magnon individual be shown to differ from modern DNA sequences, ruling out contamination?
Conclusion
The Cro-Magnon individual carried a mitochondrial DNA sequence that is still common in Europe, indicating a genealogical continuity over 28,000 years.
Supporting Evidence
- The mitochondrial DNA sequence from the Cro-Magnon individual differs from all known modern sequences.
- Contamination was ruled out by comparing the ancient DNA with that of all individuals who handled the sample.
- The study provides evidence of genetic continuity from Cro-Magnon to modern Europeans.
- Only seven individuals had contact with the sample, allowing for precise contamination tracking.
Takeaway
Scientists studied a very old Cro-Magnon skeleton and found its DNA is still similar to some people today, showing that our ancestors have been around for a long time.
Methodology
The mitochondrial DNA hypervariable region I was typed from a Cro-Magnon individual, and contamination was assessed by comparing sequences from all individuals who handled the sample.
Potential Biases
Potential bias from contamination was minimized by tracking all individuals who handled the sample.
Limitations
The sample was fragmentary and not studied morpho-anatomically, which may limit some interpretations.
Participant Demographics
The study involved researchers from various Italian institutions.
Digital Object Identifier (DOI)
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