Navigation Links
Native Americans descended from a single ancestral group, DNA study confirms
Date:4/29/2009

the 44 groups in which the allele was found, more than one out of three had the variant.

In these earlier studies, the researchers concluded that the most straightforward explanation for the distribution of the 9-repeat allele was that all modern Native Americans, Greenlanders and western Beringians descend from a common founding population. Furthermore, the fact that the allele was absent in other Asian populations most likely meant that America's ancestral founders had been isolated from the rest of Asia for thousands of years before they moved into the New World: that is, for a period of time that was long enough to allow the allele to originate in, and spread throughout, the isolated population.

As strong as this evidence was, however, it was not foolproof. There were two other plausible explanations for the widespread distribution of the allele in the Americas.

If the 9-repeat allele had arisen as a mutation multiple times, its presence throughout the Americas would not indicate shared ancestry. Alternatively, if there had been two or more different ancestral founding groups and only one of them had carried the 9-repeat allele, certain circumstances could have prompted it to cross into the other groups and become widespread. Say that there was a second allele one situated very close to the 9-repeat allele on the DNA strand that conferred a strong advantage to humans who carried it. Natural selection would carry this allele into new populations and because of the mechanics of inheritance, long stretches of DNA surrounding it, including the functionless 9-repeat allele, would be carried along with the beneficial allele.

To rule out these possibilities, the research team, which was headed by Noah Rosenberg at the University of Michigan, scrutinized DNA samples of people from 31 modern-day Asian populations, 19 Native American, one Greenlandic and two western Beringian populations.

They found that in each sample that c
'/>"/>

Contact: Liese Greensfelder
lgreensfelder@ucdavis.edu
530-752-6101
University of California - Davis
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. K-State researchers work with university in Ghana to create biofuels from native tree seeds
2. Capillary mats labor-saving, economical alternative to hand watering
3. Methyl bromide alternatives for California strawberry nurseries
4. A natural, alternative insect repellent to DEET
5. Methyl bromide alternatives indicated for North Carolina tomato production
6. Vidalia onions: Alternative to hand-transplanting proven effective
7. Parasite-resistant peppers green alternatives to chemical pesticides
8. During exercise, the human brain shifts into high gear on alternative energy
9. Alternative to burning: environmentally sound disposal for wood chips
10. CSHL team traces extensive networks regulating alternative RNA splicing
11. Researchers create safer alternative to heparin
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Native Americans descended from a single ancestral group, DNA study confirms
(Date:10/1/2014)... , Finnland, October 1, 2014 /PRNewswire/ ... Durchbruch im Bereich der Biowissenschaften   ... ein Kommen und Gehen zahlreicher Detektionstechnologien. Einige ... zum goldenen Standard. Die Photonen-Upconversion ist eine ... letzten Jahren mit Begeisterung aufgenommen wurde. Jetzt ...
(Date:9/30/2014)... San Diego, have completed the first comprehensive numerical simulation ... the pixels in an image as data points for ... The researchers, led by J.S. Chen, the William Prager ... Engineering at UC San Diego, presented their findings on ... in Pittsburgh this month. Chen also gave a keynote ...
(Date:9/30/2014)... Calif. The National Institutes of Health (NIH) ... today to develop an electrode array system that ... brain works through unprecedented resolution and scale. , ... to support President Obama,s BRAIN (Brain Research ... research effort to revolutionize our understanding of the ...
Breaking Biology News(10 mins):Innovative Verwendungslösung für die Photonen-Upconversion 2Innovative Verwendungslösung für die Photonen-Upconversion 3First comprehensive meshfree numerical simulation of skeletal muscle tissue achieved 2NIH taps lab to develop sophisticated electrode array system to monitor brain act 2NIH taps lab to develop sophisticated electrode array system to monitor brain act 3
... living in densely populated urban areas have a profound impact ... health and fitness of native wildlife. For the first time, ... urbanization and the prevalence and severity of two distinct parasites ... today,s issue of the journal PLOS ONE . ...
... made the world,s temperature records available via Google Earth. ... temperature dataset is one of the most widely used records ... allows users to scroll around the world, zoom in on ... data more easily than ever before. Users can drill ...
... Biological Studies will join Stanford University in leading a ... through a $40 million award by California,s stem cell ... center will bring together experts and investigators from seven ... of genomics the study of the complete genetic ...
Cached Biology News:Presence of humans and urban landscapes increase illness in songbirds, researchers find 2Presence of humans and urban landscapes increase illness in songbirds, researchers find 3World temperature records available via Google Earth 2Salk Institute and Stanford University to lead new $40 million stem cell genomics center 2Salk Institute and Stanford University to lead new $40 million stem cell genomics center 3
(Date:10/1/2014)... 2014 The participants committed to not ... spending their own time adjusting, tweaking and testing virtual ... were ready for judging. , “I enjoyed being involved ... leader. “The entries showed a commendable range exploring ... of the print medium and the creativity of the ...
(Date:10/1/2014)... BOSTON, MA (PRWEB) September 30, 2014 ... company, SoundConnect announces four new-hosted collaboration ... innovative bundles deliver high quality conferencing experiences for ... collaboration packages to choose from, businesses have optimized ... bundled solutions include audio only minutes ...
(Date:10/1/2014)... 2014 This report analyzes the ... Million by the following Product Segments: Proteases, ... end-use segments also analyzed are Pharmaceuticals & ... report provides separate comprehensive analytics for the ... and Latin America. Annual estimates and forecasts ...
(Date:9/30/2014)... news release is available in German . ... the Technische Universitt Mnchen (TUM) have demonstrated a new ... experiments show that future computer chips could be based ... As the main enabling technology of the semiconductor industry ... limits, the TUM researchers and collaborators at the University ...
Breaking Biology Technology:Array Architects Challenges Staff to Create with 3D Printer 2SoundConnect Launches New Audio, Web and Video Bundles 2Global Specialty Enzymes Industry 2Global Specialty Enzymes Industry 3Global Specialty Enzymes Industry 4Global Specialty Enzymes Industry 5Global Specialty Enzymes Industry 6Global Specialty Enzymes Industry 7Global Specialty Enzymes Industry 8Global Specialty Enzymes Industry 9Global Specialty Enzymes Industry 10Global Specialty Enzymes Industry 11Global Specialty Enzymes Industry 12Global Specialty Enzymes Industry 13Global Specialty Enzymes Industry 14Global Specialty Enzymes Industry 15Global Specialty Enzymes Industry 16Global Specialty Enzymes Industry 17Global Specialty Enzymes Industry 18Global Specialty Enzymes Industry 19Global Specialty Enzymes Industry 20Global Specialty Enzymes Industry 21Global Specialty Enzymes Industry 22Global Specialty Enzymes Industry 23Global Specialty Enzymes Industry 24Global Specialty Enzymes Industry 25Global Specialty Enzymes Industry 26A new dimension for integrated circuits: 3-D nanomagnetic logic 2A new dimension for integrated circuits: 3-D nanomagnetic logic 3
... Pa., Oct. 5 Genaera,Corporation (Nasdaq: GENR ... at two upcoming conferences, Biotech 2007 in Philadelphia ... San Francisco on October,9-11, 2007. Henry R. ... of Genaera, is scheduled to participate in a ...
... BASINGSTOKE, England and CAMBRIDGE, Massachusetts, October 4, Shire ... that Japan,s Ministry of Health, Labour and Welfare ... the treatment of,Hunter syndrome, for sale and marketing ... ELAPRASE is now approved for marketing and commercial,distribution ...
... Pharmasset, Inc.,(Nasdaq: VRUS ) has entered into a ... to certain terms and conditions of,the agreement, Horizon will ... its option, Pharmasset may receive a second loan of ... of $10 million by November 30, 2008,provided conditions precedent ...
Cached Biology Technology:Genaera to Present at Biotech 2007 and BIO InvestorForum 2Genaera to Present at Biotech 2007 and BIO InvestorForum 3Shire's ELAPRASE(R) (idursulfase) Approved in Japan for the Treatment of Hunter Syndrome 2Shire's ELAPRASE(R) (idursulfase) Approved in Japan for the Treatment of Hunter Syndrome 3Shire's ELAPRASE(R) (idursulfase) Approved in Japan for the Treatment of Hunter Syndrome 4Pharmasset Accesses up to $30 Million of Working Capital 2Pharmasset Accesses up to $30 Million of Working Capital 3
[5,6,8,9,12,14,15(n)-3H]Prostaglandin D2, 925 kBq, 25 uCi. Methanol:water:acetonitrile (3:2:1) solution.> 3.0 TBq/mmol, > 80 Ci/mmol.3.7 MBq/ml, 100 uCi/ml. Category: Radiochemicals &Radiation Safety...
One-step, microplate or cuvet, turbidometric, linear detection range 0.096 mg/dL to 11.5 mg/dL. Procedure: 5 min....
Moue Serum 8-12 Weeks Old...
... Serum • Mouse serum is collected off the clot ... weeks of age. Available Anticoagulants: N-02: ... K2EDTA N-08: Potassium Oxalate N-10: ... ACD N-07: CPD N-09: ...
Biology Products: