Eve dating an african

29-Jun-2015 14:05 by 6 Comments

Eve dating an african - Live adult sex cam games

Sykes and his colleagues accept this as the genetic echo of the spread of agriculture, but note that it is fairly weak.They conclude that, far from being overwhelmed by incoming farmers, the indigenous hunter-gatherer population remained intact and learned how to farm.

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DNA analysis traced human ancestry back to an African "Eve," setting off debate about how modern humans evolved.Because changes in the Y chromosome are caused only by mutations, as in mt DNA, it may be used as a clock.Assuming that all living humans share a common male ancestor, it should be possible to estimate when he lived.Documentation of the early presence of Caucasian people in northwestern China, and information about their affinities with either modern European or Indo-Iranian populations, could contribute to the debate about the spread of Indo-European languages.Chinese and Uyghur archaeologists have been excavating naturally mummified bodies there since the 1970s.Armour and his colleagues conclude that the evidence fits with the development of modern humans in Africa and an emigration by a small number of them that became the basis for non-African populations.

These observations, they say, are more difficult to reconcile with a multiregional model for the origin of modern humans.

The data reflect population dynamics, they say, and do not support one model of modern human origins over another.

Scientists are also studying DNA from the Y chromosome, which is passed only from father to son and is not recombined with the mother's genes.

C., to Greece and across all of Europe, ending in Britain and Scandinavia about 4000 B. Using mt DNA analysis, Sykes claims that the ancestors of most modern Europeans arrived at least 20,000 years ago, long before the supposed arrival of Neolithic farmers.

In analyzing mt DNA from more than 800 modern Europeans, Sykes and his colleagues identified at least five main groups.

Comparison will determine how much of the ancient genetic composition survives.