Before revision: A person's DNA markers being matched to a particular region does not necessarily indicate that their ancestors are from that region, due to the fact human populations have migrated all throughout history, and the geopolitical borders of modern nations are not the same as they once were in the past.
After revision: A person's DNA markers being matched to a particular region does not necessarily indicate that their ancestors are from that region, due to the fact human populations have migrated all throughout history, and the geopolitical borders of modern nations are not the same as they were in the past.