Complex sentence: MtDNA mutations are also passed down relatively unchanged from generation to generation; so all humans share the same mtDNA-types, the logical extension of this is that all humans ultimately trace back to one woman, who is commonly referred to as Mitochondrial Eve.
Split into simpler sentences: MtDNA mutations are also passed down relatively unchanged from generation to generation, so all humans share the same mtDNA-types. The logical extension of this is that all humans ultimately trace back to one woman, who is commonly referred to as Mitochondrial Eve.