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

omputers.

But mitochondria -- the tiny organelles that serve as energy factories inside all human cells -- have their own genome. Besides containing 37 genes that rarely change, they contain a "hypervariable" region, which changes fast enough to provide a molecular clock calibrated to times comparable to the age of modern humanity. Because each person's mitochondrial genome is inherited from his or her mother, all mitochondrial lineages are maternal.

To infer mtEve's age, scientists must convert the measures of relatedness between random blood donors into a measure of time.

"You have to translate the differences between gene sequences into how they evolved in time," said co-author Krzysztof Cyran, vice head of the Institute of Informatics at Silesian University of Technology in Gliwice, Poland. "And how they evolved in time depends upon the model of evolution that you use. So, for instance, what is the rate of genetic mutation, and is that rate of change uniform in time? And what about the process of random loss of genetic variants, which we call genetic drift?"

Within each model, the answers to these questions take the form of coefficients -- numeric constants that are plugged into the equation that returns the answer for when mtEve lived.

Each model has its own assumptions, and each assumption has mathematical implications. To further complicate matters, some of the assumptions are not valid for human populations. For example, some models assume that population size never changes. That is not true for humans, whose population has grown exponentially for at least several thousand generations. Other models assume perfect mixing of genes, meaning that any two humans anywhere in the world have an equal chance of producing offspring.

Cyran said human genetic models have become more complex over the past couple of decades as theorists have tried to correct for invalid assumptions. But some of the corrections -- like
'/>"/>

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:12/11/2014)... Dec. 09, 2014 Research and Markets ... http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has announced the addition of the ... their offering. One major trend emerging ... advances in technology, it is important to upgrade biometric ...
(Date:12/11/2014)... 2014  Data Sciences International (DSI), the global leader ... series of digital telemetry implants to meet the ... part of the PhysioTel™ Digital platform, was designed ... data when incorporating functional endpoints into repeat-dose toxicology ...
(Date:12/10/2014)... , Dec. 9, 2014  Wake Forest Baptist Medical Center today ... School of Medicine. Funding for this $50 million capital project ... publicly launched next summer. The medical education ... Reynolds Tobacco Company complex, adjacent to 525@vine in Wake Forest ...
Breaking Biology News(10 mins):Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2New telemetry implants expected to change how large animal toxicology studies are conducted 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 3Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 4
... 2, 2012 Biochemist and geneticist Alexander Varshavsky (California Institute ... lived in the USA since 1977, has been awarded the ... Molecular Biology (GBM). That medal is considered to be the ... By means of genetic research carried out with yeast and ...
... among his most vibrant and celebrated works, Vincent van Gogh,s ... basis has, until now, been a mystery. In a study ... of Georgia scientists reveal the mutation behind the distinctive, thick ... more than 100 years ago. The most common sunflower ...
... parasite, less resistance can sometimes be better than more, a ... known as Daphnia dentifera endures periodic epidemics of ... percent of the Daphnia population. During these epidemics, the ... A new study led by Georgia Institute of Technology ...
Cached Biology News:Otto Warburg Medal for Alexander Varshavsky 2Otto Warburg Medal for Alexander Varshavsky 3Genetic mutation depicted in van Gogh's sunflower paintings revealed by scientists 2Weakness can be an advantage in surviving deadly parasites, a new study shows 2Weakness can be an advantage in surviving deadly parasites, a new study shows 3
(Date:1/22/2015)... Selexis SA, a serial innovation company ... (RCBs) used for drug discovery to commercial manufacturing, announced ... Next-Generation Sequencing (NGS) data packages. The NGS ... by ensuring the integrity of the gene, validation of ...
(Date:1/22/2015)... , Jan. 22. 2015  Varian Medical Systems (NYSE: ... been honored for its commitment to sustainability with inclusion on ... is the highest ranked healthcare equipment company among the Corporate ... the World Economic Forum at Davos, Switzerland ...
(Date:12/24/2014)...  United Therapeutics Corporation (NASDAQ: UTHR ) announced ... has submitted a pre-market approval application to the U.S. ... Medtronic,s SynchroMed ® II implantable drug infusion system ... Therapeutics, Remodulin ® (treprostinil) Injection delivered intravenously to ...
(Date:12/24/2014)... “Preparative & Process Chromatography Market by Instrument ... Buffers, Valves, Guages, Seals), Accessories, Services, End User ... 2019” provides a detailed overview of the major ... strategies impacting the preparative and process chromatography market ...
Breaking Biology Technology:Selexis Generated Research Cell Banks Now Fully Sequenced Using Next-Generation Sequencing 2Varian Honored Among World's 100 Most Sustainable Corporations 2United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 2United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 3United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 4Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 2Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 3Preparative and Process Chromatography Market is expected to reach $9 billion by 2019 - New Report by Marketsandmarkets 4
... Pharmaceuticals, Inc. (NYSE: WPI ) today announced ... from the United States Food and Drug Administration on ... tablets, the generic equivalent to Roche,s BONIVA® tablets. Watson ... quarter. BONIVA® 150mg tablets had total U.S. sales of ...
... 2012 Creative Bioscience, a leading maker of dietary supplements ... African Mango Lean ™, African Mango 1200 ™, ... and its new Raspberry Ketone 1234 ™ weight loss ... Markets locations across the West and Southwest. ...
...  The San Diego entrepreneur group Bootstrappers Breakfast ( www.bootstrappersbreakfast.com ... a.m. on the last Friday of every month. The ... breakfast" is Friday, March 30 at 7:30 a.m. at ... Attendees, all with an entrepreneurial streak, discuss innovative ways to ...
Cached Biology Technology:Watson's Generic BONIVA® 150mg Receives FDA Approval 2Creative Bioscience All-Natural Dietary Supplements Now Available at Sprouts Farmers Market 2Creative Bioscience All-Natural Dietary Supplements Now Available at Sprouts Farmers Market 3Entrepreneurs to Eat Problems for Breakfast in San Diego 2
... Art GLP facility with capabilities from ... fermentation. Coordinated process development from ... operation capable of simultaneous production runs ... Hosts include: Bacteria, Yeast, Fungi, ...
Request Info...
Immunogen: VDAC3 Protein Storage: -20 C, Avoid Freeze/Thaw Cycles...
... 75 x 25 ... recommended for immunohistochemistry of paraffin-embedded sections, ... one end, markings will ... procedures, precleaned, ...
Biology Products: