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was 77% European and 23% Indigenous DNA. By contrast, in southern and northern regions of the country, the Indigenous component surpassed the European component.Related genetic studies conducted on Santiago's mtDNA and Y-DNA found a sex bias in the ethnic origin of those sex-specific chromosomes. Thus, across all social classes, an overwhelming 84% of Santiago's mitochondrial DNA (inherited only from mother to child) is of Indigenous origin,

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