Mitochondrial Eve

Because all mitochondrial DNA  is generally passed from mother to offspring without recombination, all mitochondrial DNA (mtDNA) in every living person is directly descended from hers by definition. Mitochondrial Eve is estimated to have lived around 200,000 years ago,most likely in East Africa,when Homo sapiens sapiens were developing as a population distinct from other human sub-species.

Hypothetical picture of "Mitochondrial Eve"