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Amazigh people and climate adaptation
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[QUOTE]Originally posted by MindoverMatter718: [QB] [QUOTE]Originally posted by osirion: [qb] Basically what you are saying was my original position. [/qb][/QUOTE]How? Elaborate please, because I don't think so. [QUOTE]Originally posted by osirion: [qb] However, it also means that the climate allowed for this gene to be expressed. If this allele was detrimental in the North African climate it certainly would not be represented in 62-100 percent of the population. [/qb][/QUOTE]Who said the allele was detrimental? The skin color the allele [i]causes[/i] is detrimental in this African environment, the allele doesn't discriminate and it gets passed on regardless, a European born in Africa is not going to automatically turn darkskinned because his/her skin color is not suited for the environment. So again, you're wrong, and what it means is that sexual selection and genetic drift helped spread this allele in geographically proximate populations in northern Africa, has nothing at all to do with climate allowing for it to spread sorry kiddo. If that were the case then the leucoderm phenotype associated with Europeans would have arose in situ Africa instead of being introduced genetically. If the climate would have allowed for this change instead of sexual selection and genetic drift we wouldn't see this; [URL=http://www.ncbi.nlm.nih.gov/pubmed/20031391]New data tells us more about cancer incidence in North Africa.[/URL] ^^This wouldn't occur if north Africa's climate was advantageous to this lighter skin. What makes sense, is sexual selection and/or genetic drift which ultimately spread this allele regardless of the detrimental results the allele caused in the environment of north Africa. [/QB][/QUOTE]
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