Africans’ genes mute on human birthplace
2012-09-24 0:00

By Erin Wayman | ScienceNews.org



The origin story for Homo sapiens is a messy tale. Rather than emerging from one small population, the human species likely evolved from a dispersed, complex network of groups that mixed and mated with each other, scientists report online September 20 in Science.

The new research is one of the largest genetic studies of southern Africa’s click-speaking hunter-gatherers known as the Khoisan. Sometimes called Bushmen, the Khoisan are the world’s most genetically diverse people and diverged from other populations very early in human history.

The new work dates the genetic split between the Khoisan and the rest of humankind to at least 100,000 years ago, which is in line with other estimates. That’s 55,000 years older than the next branch on the human family tree, when Central African pygmies split off. The researchers also found that the Khoisan divided into a northern and a southern group approximately 35,000 years ago.

But when the scientists looked for genetic clues pointing to where in sub-Saharan Africa humankind began, they couldn’t trace modern groups back to any one region. That suggests early humans came from a highly structured population with genetic exchange between subgroups.

“The complexity of the South African population is the big story,” says Adam Siepel, a computational biologist at Cornell University. “It undermines simpler stories trying to pinpoint a single geographic origin of modern humans.” Previous fossil evidence had suggested East Africa while smaller genetic analyses indicated South Africa.

In the new study, Carina Schlebusch of Sweden’s Uppsala University and colleagues looked at single nucleotide polymorphisms, or SNPs, which are locations in the genetic code where people commonly differ. The researchers surveyed 2.3 million SNPs in 220 individuals from 11 African populations, including seven Khoisan groups. After combining the new data with previously published data, the team assessed four measures of genetic variation to find where in Africa humans originated, but the results didn’t converge on one location.

[...]


Read the full article at: sciencenews.org





New Human Haplogroup Announcements Question the ’Out of Africa’ Hypothesis






Related Articles
DNA study seeks origin of Appalachia’s "Melungeons"
The Origin of Mysterious, Dark-Skinned Blonds Discovered
Humans Originated Near Rivers, Evidence Suggests
The Mysterious Origins of Man & Humans Walked On Modern Feet 1.5 Million Years Ago, Fossil Footprints Show
Michael Tsarion - The Irish Origins Of Civilization Excerpts & Coronation Queen Elizabeth II


Latest News from our Front Page

New Jersey Shopkeeper Hangs 'White History Month' Sign In Window
2015-03-05 18:08
A deli owner in Flemington, New Jersey, has angered many of his neighbors by posting a sign on his window that reads, "Celebrate Your White Heritage in March White History Month." Jim Boggess, who is the owner of Jimbo's Deli, says he put up the sign to remind everyone that they should be proud of their race and culture. "No matter what ...
The Viking ”Maine Penny” Mystery
2015-03-05 3:41
In 1957, during his second year of digging at the Goddard site; a large prehistoric Indian trade village in Penobscot Bay on the central Maine coast, local resident and amateur archaeologist Guy Mellgren found a small silver coin. The coin is later identified by experts as a Norse silver penny dating to the reign of Olaf Kyrre, king of Norway ...
The Sagas of the (Viking) Icelanders Shed Light on Golden Age
2015-03-05 3:40
The Sagas of the Icelanders have long been preserved as the most comprehensive specimen of the literary culture of the 13th and 14th centuries of Iceland. In writing these sagas, many attributes of the 10th and 11th centuries were conserved, particularly individual biographies, the history of family feuds, and the overall evolution of the one of the greatest settlements ...
Benjamin Netanyahu's Full Speech to Congress
2015-03-05 1:36
Here is the full speech of Pathological Zionist Liar Benjamin Netanyahu to the United States Congress. "And the Oscar goes too ...." Description from YouTube: Prime Minister Benjamin Netanyahu of Israel used one of the most prominent platforms in the world on Tuesday to warn against what he called a “bad deal” being negotiated with Iran to freeze its nuclear program, bringing ...
The FDA Admits That Prior to 2011 Over 70% of U.S. Chickens Contained Cancer-Causing Arsenic
2015-03-04 20:32
Prior to 2011, the cancer-causing toxic chemical Roxarsone, which in high doses could kill you, was being added to chicken feed on purpose, giving store-bought chicken the illusion of healthy coloring and plump appearance. Shockingly, this was the case with more than 70 percent of all U.S. chickens! A recent article was published stating that this continued to be the ...
More News »