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DNA studies if black amazigh im Morocco
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[QUOTE]Originally posted by Swenet: [QB] @Doug The way I see it, is that there is affinity due to admixture and affinity due to phylogenetic relatedness. The former involves plain admixture, the latter has to do with how long ago ancestral populations split off. The affinity you're talking about between the Sahel and the Maghreb is affinity due to admixture. The affinity between, say, Afro-Caribbeans and African Americans is phylogenetic affinity. African Americans and Afro Caribbeans don't need admixture to be closely related. They are already closely related whether they intermix or not. The same doesn't apply to Sahelian populations and Maghrebis. While Sahelian populations like the Tibbou may be related to Berbers, the two genetic components in their genome (mostly 'Nilo-Saharan-like' and 'Berber-like') have no close relationship. The source populations they're made up of are structurally different (i.e. they have completely different allele frequencies and certain patterns in their genomes). This is why scholars use proxies when they want to understand Berber populations. They're not interested in sampling the entire Sahara. They just want to sample the source populations that can model populations in the Sahara. You want them to go the extra mile and also sample admixed population in the Sahel that carry ancestry from the source populations. That's just redundant. Why would they want to do that? It would be nice if they did from our point of view, but it's not a requirement for what they set out to do. [/QB][/QUOTE]
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