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why Australian Aborigenes have straight hair
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[QUOTE]Originally posted by the lioness: [QB] [QUOTE]Originally posted by xyyman: BTW : the question should be, Why do Andaman Islanders, Papua New Guineans etc have kinky hair? LOL!! [/QUOTE]They are the small exception to a very large pattern of straight haired people in Eurasia. Why is there such a pattern? Answer this first. After that deal with exceptions, exceptions which do not disprove the larger rule. For example some Eskimos have somehwat dark skin. Why is this what happened to lower sunlight exposure and depigmenation? Answer, satisfactorily explained exception: they eat a lot of fish. Similarly I asked AGÜEYBANÁ why don't many American Indians of the North who live inland and don't eat a lot of fish have dark skin? [QUOTE]Originally posted by AGÜEYBANÁ(Mind718): [qb] Migrating from Asia, they reached the Americas before the gene for lightskin amongst northeast Asians became widespread, therefore the allele is not present amongst these people you question at high frequencies as that of those who stayed in Asia. Source... Genetic Evidence for the Convergent Evolution of Light Skin in Europeans and East Asians-- Heather L. Norton*,1, Rick A. Kittles [/qb][/QUOTE]A similar explanation could be made about Andaman Islanders, Papua New Guineans. They reached these areas before the allele for straight hair. They were probably a group of people that stayed strictly along the coast whereas other people settled at times slightly more Northward their hair straightening then migrated again later South (Austrailians) who look somewhat different from Andaman Islanders and Papua New Guineans. We are not dealing with historical timeframes, prehistorical is many times longer. The simple fact that demolishes all of this is that you do not find tribes of people with long straight laying hair like Asians have in Africa. The best that can be done is produce ancedotal examples of individual people who live in Africa of which the ancestry of these individuals unknown. The fact that Eurasians have 99% straight hair and Africans have 99% afro kinky hair cannot be explained by saying that diverse mutations are all completely random and hair type has nothing to do with climate. No one knows the exact migrations routes that people took to far off places like Australia. There are many settling points in between Africa and Australia and there is no reason to believe that people migrating out of Africa made a continous very long journey until the got there, to a place they didn't even know existed until they got there. I don't know why people like Papua New Guineans are being brought up, we don't even have to get into debates about the migration routes. The fact that Papua New Guineans have afro kinky hair only further attests to evidence that it is an adpatation to humid tropical environments. If you found such people living up North that might be a problem. another feather in the cap of the lioness [/QB][/QUOTE]
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