Mitochondrial DNA is what makes each of use very similiar, while nuclear DNA makes us different. This is because mitochondrial DNA comes from our mothers and theoretically we can all trace our commonality back to a single women, known as mitochondrial eve. She might have looked something like this:
(Just Kidding...)
Different people groups have different physical appearances, but we are all fundamentally are very similar. Anyway, check out these celebrities showing how unique the human race is...
(ugly white person)
(awesome Asian person)
(Alfred)
(funny Mexican man)
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