Navigation Links
Mother of all humans lived 200,000 years ago
Date:8/17/2010

HOUSTON -- (Aug. 17, 2010) -- The most robust statistical examination to date of our species' genetic links to "mitochondrial Eve" -- the maternal ancestor of all living humans -- confirms that she lived about 200,000 years ago. The Rice University study was based on a side-by-side comparison of 10 human genetic models that each aim to determine when Eve lived using a very different set of assumptions about the way humans migrated, expanded and spread across Earth.

The research is available online in the journal Theoretical Population Biology.

"Our findings underscore the importance of taking into account the random nature of population processes like growth and extinction," said study co-author Marek Kimmel, professor of statistics at Rice. "Classical, deterministic models, including several that have previously been applied to the dating of mitochondrial Eve, do not fully account for these random processes."

The quest to date mitochondrial Eve (mtEve) is an example of the way scientists probe the genetic past to learn more about mutation, selection and other genetic processes that play key roles in disease.

"This is why we are interested in patterns of genetic variability in general," Kimmel said. "They are very important for medicine."

For example, the way scientists attempt to date mtEve relies on modern genetic techniques. Genetic profiles of random blood donors are compared, and based upon the likenesses and differences between particular genes, scientists can assign a number that describes the degree to which any two donors are related to one another.

Using mitochondrial genomes to gauge relatedness is a way for geneticists to simplify the task of finding common ancestors that lived long ago. That is because the entire human genome contains more than 20,000 genes, and comparing the differences among so many genes for distant relatives is problematic, even with today's largest and fastest superc
'/>"/>

Contact: Jade Boyd
jadeboyd@rice.edu
713-348-6778
Rice University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Mother Nature to provide an environmentally friendly method for reducing mosquitoes
2. TGen finds protein inhibitor revives chemotherapy for ovarian patients
3. About 94 percent of breastfeeding mothers do not follow a proper diet
4. Can a mothers voice spur recovery from a coma?
5. Giving DHA supplements to breastfeeding mothers
6. HPV vaccination more likely if mothers approve
7. Babys obesity risk: Whats the mothers influence?
8. Baby monkeys receive signals through their mothers breast milk
9. Mother bats expert at saving energy
10. Mothers exposure to bisphenol A may increase childrens chances of asthma
11. Climate debate: Whats warming us up? Human activity or Mother Nature?
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/16/2014)... Cancer constantly wages war on the human body. ... a stalemate. In pancreatic cancer, this stalemate—known as ... becoming aggressively malignant, a phenomena that is poorly ... in the laboratory of Salvatore Torquato, a Professor ... the conditions surrounding tumor dormancy and the switch ...
(Date:10/16/2014)... Oregon and Washington land managers have a new synthesis ... eastside moist mixed-conifer (MMC) forests in the two states. ... Forests in Eastern Oregon and Washington: A Synthesis of ... Management, a general technical report published by the U.S. ... response to a request from managers for a synthesis ...
(Date:10/16/2014)... cultivated efficiently, they are anything but sustainable: environmental ... cultivation is becoming increasingly evident. Despite their disadvantages, ... are regarded as the sole possibility of achieving ... finds Bernhard Schmid, an ecology professor at the ... of agriculture and forestry. After all, a new ...
Breaking Biology News(10 mins):Modeling tumor dormancy 2New report synthesizes best available science on management of moist mixed-conifer forests 2Plant communities produce greater yield than monocultures 2Plant communities produce greater yield than monocultures 3
... A tiny wasp that lays its eggs under the ... most diverse groups of insects on Earth. Now researchers ... thought. (To see an audio slide show on ... By combining ecological and genetic data with the painstaking ...
... risk during cardiac procedures. Doctors performing heart surgery also ... IAEA is helping to raise awareness of threats, through ... X-ray imaging systems. The issue of radiation protection ... of lengthy angioplasty and other cardiac interventions performed under ...
... insulin-like growth factor 1 (IGF-I) in breast cancer cells predicts ... treatment, said researchers at Baylor College of Medicine in a ... Journal of Clinical Oncology. The finding gives impetus to ... various tumors. "These findings come at a critical time," ...
Cached Biology News:Diversity among parasitic wasps is even greater than suspected 2Diversity among parasitic wasps is even greater than suspected 3Protecting those who heal 2Growth factor predicts poor outcome in breast cancer 2
(Date:10/25/2014)... Investor-Edge has initiated coverage on ... ), Vertex Pharmaceuticals Inc. (NASDAQ: VRTX ), ... Pharmaceuticals Inc. (NASDAQ: PPHM ), and StemCells ... can be accessed at: http://investor-edge.com/register . ... on a positive note as the Dow Jones Industrial ...
(Date:10/22/2014)... -- Research and Markets has announced ... Market (Product types, Application, Technology, End User and ... Demand, Insights, Analysis, Research, Report, Opportunities, Segmentation and ... offering. This new report titled, ... and Geography) Global Size, Industry Analysis, Trends, Opportunities, ...
(Date:10/22/2014)... 21, 2014 Shimadzu Scientific Instruments introduces ... tool for the pain management and clinical markets. The ... and review by allowing users to highlight and review ... , QuantAnalytics allows analysts to filter results by group ... processing by eliminating the need to sift through analytes ...
(Date:10/22/2014)... Khaimah, UAE (PRWEB) October 22, 2014 ... life science and healthcare projects, announces the addition of ... DRCOG DCH to its advisory team. Dr. Siddiqui will ... team. , A graduate of University College ... was subsequently degreed in medicine in 2001. With further ...
Breaking Biology Technology:Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 2Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 3Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 4Biotech Stocks Technical Data - CytRx, Vertex Pharma, Alexion Pharma, Peregrine Pharma, and StemCells 5Global DNA Diagnostics Market (Product types, Application, Technology, End User and Geography) - Forecast to 2020 2Global DNA Diagnostics Market (Product types, Application, Technology, End User and Geography) - Forecast to 2020 3Shimadzu Releases QuantAnalytics Open Access LCMS Software Package for Clinical Applications 2Dr. Yousef Siddiqui joins the Grace Century Advisory Team 2
... Guide, ,I. Description ,II. Product Components ... ,IV. Protocol for Extraction of DNA from Whole Blood ... Whole Blood ,VI. Quantification of Amplified Products ... Application Data , References , Contact Information ...
... ,I. Description ,II. Product Components ,III. ... Protocol for Extraction of DNA from Blood Card ... Card ,VI. Quantification of Amplified Products ,VII. ... , References , Contact Information , , ,Application ...
... , , ... , , , Mutations ... of the colon, pancreas, liver, spleen, stomach or lungs. The,CDKN2A/P16 gene is ... which point mutation is present,in patient tissue samples. Freshly frozen tumor sections ...
Cached Biology Technology:Protocol for GenomePlex Whole Genome Amplification ,from Whole Blood 2Protocol for GenomePlex Whole Genome Amplification ,from Whole Blood 3Protocol for GenomePlex Whole Genome Amplification ,from Whole Blood 4Protocol for GenomePlex Whole Genome Amplification ,from Whole Blood 5Protocol for GenomePlex Whole Genome Amplification ,from Whole Blood 6Protocol for GenomePlex Whole Genome Amplification from Blood Card 2Protocol for GenomePlex Whole Genome Amplification from Blood Card 3Protocol for GenomePlex Whole Genome Amplification from Blood Card 4Protocol for GenomePlex Whole Genome Amplification from Blood Card 5Protocol for GenomePlex Whole Genome Amplification from Blood Card 6Mutation detection for the,K- rasand P16 genes 2Mutation detection for the,K- rasand P16 genes 3Mutation detection for the,K- rasand P16 genes 4Mutation detection for the,K- rasand P16 genes 5Mutation detection for the,K- rasand P16 genes 6
6B9...
... DNA polymerase from Thermus aquaticus expressed in ... 1 tube of 250 units enzyme/tube and ... DNA), is the same enzyme as AmpliTaq ... a proprietary separation process to ensure that ...
... • Enzyme concentration - 5 units/µL ,• ... higher yields ,• Leaves an 'A' ... DNA polymerase which exhibits very high activity ... applications. To ensure the quality of the ...
... AmpliTaq DNA Polymerase is the most thoroughly ... a testimony to its overall utility and ... it ideal for PCR applications. , ... results. ,, AmpliTaq DNA Polymerase is ...
Biology Products: