Scientists use mitochondrial DNA to track the migration of humans across the planet.After a group migrates away from their ancestral homeland,any mutations that occur are not mixed with those left in the ancestral population.Therefore,mitochondrial DNA samples taken from ____ would have the most unique mutations,representing the most recent population to migrate to a new area.

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The Americas were among the last regions to be populated by humans, so mitochondrial DNA from this region would have accumulated the most unique mutations since the migration from the ancestral populations.

Scientists Use Mitochondrial DNA to Track the Migration of Humans