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

An Occupied Country
2016-02-06 5:42
When people refer to occupation governments or occupied countries, the first thought is often of military occupation—the garrisoning of foreign troops in one’s cities and civil administration by their military executives. The other vision is the trope of a cabal of Haredim sitting in a darkly-lit boardroom with a map of the world on the wall, a dated reading of ...
Immortal Symbols 1941
2016-02-06 2:07
Youtube description: Dutch film "Eeuwig Leevende Tekens" by Hamer - "Volksche Werkgemeenschap" (Folkish Study Group) - ancestral heritage, solar wheel, sun cross, tree of life, etc. Subs by Otharus - http://fryskednis.blogspot.com Source: youtube.com
Ex-German media boss admits on live radio the national news agenda is govt controlled
2016-02-06 1:32
f you really want a lesson in how the Western popular press works, this is it. Without question, Germany is the leading power in Europe. ZDF is its state broadcaster and most popular channel. Together with sister network ARD; German's are obliged to pay €17.98 per month to fund it. This week, during a radio event in Berlin, the retired head of ZDF ...
British teenager is gang raped by 'Moroccan' men after being dragged into a car in Spain
2016-02-06 1:09
A British teenager claims to have been gang-raped in a Spanish resort after being dragged into a car by a group of Moroccan men, it was reported today. The 18-year-old claimed she was attacked while walking home from work late at night in Sabinillas, near Marbella. Police are said to be investigating a group of Moroccan men in the area. A British teenager ...
8 Ways Racially Diverse Schools Hurt White Kids
2016-02-06 1:02
Description from YouTube: I argue against Mother Jones Propaganda Link to the original Mother Jones Article: 3 Ways White Kids Benefit Most From Racially Diverse Schools Links to all the articles and other citations mentioned in my video can be found here: docdro.id/6CpKvgA Source: youtube.com
More News »