From Razib Khan's substack. A brief quote from the article:
The admixture results immediately offer a simple explanation for why in the PCA of the 2010 paper the Palestinians were shifted toward the Saudis: they have African ancestry, and the Arabian cluster that is maximized in the Saudis is itself closer to the Nigerian African cluster genetically on the pairwise Fst representation. In other words, any African ancestry in Palestinians will also move them on a PCA toward Saudis even without direct Saudi ancestry per se.
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