If humans originated in Africa, how can we have anything other than 100% African DNA?

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is there some sort of cutoff point where scientists decided “everyone in Ireland 100,000 years ago will be considered 100% Irish”?

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Anonymous 0 Comments

Great answer below. I learned something today, that’s a good day.

I would like to share a funny yet sad story. I distant cousin and I were having a discssion about ancestry. He did one of the DNA tests to determine his “heritage.” Let me stop here and say he is one of the most racist people I know. Anyhow, when he told me he is pure scandinavian, 100%, I laughed and said he should ask for his money back. He gave me this curious look and asked why. I told him if he went back far enough he would realize there was some African DNA in his lineage. I really thought his head was going to explode. Needless to say, he doesn’t speak to me any more. Not a bad thing really. I still get a chuckle out of it.

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