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Max Planck, Harvard and Sao Paulo researchers deny their DNA models are suspect
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[QUOTE]Originally posted by the lioness,: [QB] [IMG]https://images.squarespace-cdn.com/content/5681a8b7841ababe4155de1c/1451340885619-LE8NMXPJ45DPW4KXYIWJ/Naia_Skull_Science.jpg?content-type=image%2Fjpeg[/IMG] [QUOTE] HN5/48 aka [b]NAIA[/b] DOI: 10.1126/science.1252619, 750 (2014);344Science et al.James C. Chatters and [b]Modern Native Americans Late Pleistocene Human Skeleton and mtDNA Link Paleoamericans[/b] Here we report a nearly complete, Late Pleistocene–age human skeleton [b]HN5/48[/b] with intact dentition from Hoyo Negro (HN), a submerged collapse chamber in the Sac Actun cave system, eastern Yucatan Peninsula, Mexico (Fig. 1). The ancestry of the earliest Americans is still debated, however, because the oldest skeletal re-mains from the Americas (>9 ka, the Paleoameri-cans) consistently fail to group morphometrically with modern Native Americans, Siberians, and other northeast Asians (6). Paleoamericans ex-hibit longer, narrower crania and smaller, shorter,more projecting faces than later Native Americans (7). In nearly all cases, they are morphologically most similar to modern peoples of Africa who tend to exhibit such specialized (Sinodont)traits as winged, shovel-shaped upper incisors, three-rooted lower first molars, and small or absent thirdmolars; from Paleoamericans, who exhibit a less spe-cialized (Sundadont) morphology (7). These differ-ences suggest that America was colonized byseparate migration events from different parts of Eurasia(11) or by multiple colonization events from Beringia(12), or that evolutionary changes occurred in theAmericas after colonization (13). Because of differences in craniofacial morphology and dentition between the earliest American skeletons and modern Native Americans, separate origins have been postulated for them, despite genetic evidence to the contrary. We describe a near-complete human skeleton with an intact cranium and preserved DNA found with extinct fauna in a submerged cave on Mexico’s YucatanPeninsula. This skeleton dates to between 13,000 and 12,000 calendar years ago and hasPaleoamerican craniofacial characteristics and a Beringian-derived mitochondrial DNA (mtDNA)haplogroup (D1). Thus, the differences between Paleoamericans and Native Americans probablyresulted from in situ evolution rather than separate ancestry . This 13- to 12-ka Paleoamerican skeleton thus suggests that Paleoamericans represent an early population expansion out of Beringia, not an earlier migration fromelsewhere in Eurasia. This is consistent with hypotheses that both Paleoamericans and NativeAmericans derive from a single source population, whether or not all share a lineal relationship.In light of this finding, the differences in craniofacial form between Native Americans and theirPaleoamerican predecessors are best explained as evolutionary changes that postdate the divergence of Beringians from their Siberian ancestors. [/QUOTE] [/QB][/QUOTE]
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