I’m African American. Hypothetically, a thousand or so years ago, say my ancestor was an Asian (For example) who married a Black person. Naturally, their child was 1/2 Black and 1/2 Asian. That child went on to marry a Black person. The ancestry continues on and on for many years until we’re in 2022.
Coincidentally, none of the children ever married an Asian and all of the people they married had no trace of Asian blood in their lineage, making that one ancestor the only trace of Asian in me.
But do I still have Asian in me? What fraction would that even look like? Or at some point does it get “erased” as a result of being reduced by the other races, bloodlines, etc. over the course of 1000+ years?
I hope the example I gave makes sense. I guess I’m basically asking if, at some point, race/lineage gets erased from your cells/DNA if that race hasn’t been present at all in your family for several centuries.
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What I can tell is modern DNA from almost every culture or ethnic group is not “pure”. Human migration has been going on for thousands of years. Jewelry bearing the sign for Allah has been found in viking burials. Many Native American tribes ban their members from doing these ancestry DNA tests and so the “native” DNA is generally from central or south American people and used for comparison.
I do remember reading about a ship from south Asia (Chinese I believe) shipwrecked off the coast of Africa long ago and the sailors intermarried amongst the local population
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