Navigation Links
Ancient African exodus mostly involved men, geneticists find
Date:12/21/2008

BOSTON, Mass. (Dec. 21, 2008) Modern humans left Africa over 60,000 years ago in a migration that many believe was responsible for nearly all of the human population that exist outside Africa today.

Now, researchers have revealed that men and women weren't equal partners in that exodus. By tracing variations in the X chromosome and in the non-sex chromosomes, the researchers found evidence that men probably outnumbered women in that migration. The scientists expect that their method of comparing X chromosomes with the other non-gender specific chromosomes will be a powerful tool for future historical and anthropological studies, since it can illuminate differences in female and male populations that were inaccessible to previous methods.

While the researchers cannot say for sure why more men than women participated in the dispersion from Africaor how natural selection might also contribute to these genetic patternsthe study's lead author, Alon Keinan, notes that these findings are "in line with what anthropologists have taught us about hunter-gatherer populations, in which short distance migration is primarily by women and long distance migration primarily by men."


'/>"/>

Contact: David Cameron
david_cameron@hms.harvard.edu
617-960-7221
Harvard Medical School
Source:Eurekalert

0

GOOD

Page: 1

Related biology news :

1. Scientists retrace evolution with first atomic structure of an ancient protein
2. CU-Boulder team discovers first ancient manioc fields in Americas
3. Ancient organisms discovered in Canadian gold mine
4. Amber specimen captures ancient chemical battle
5. Ancient whale fall from Californias Año Nuevo Island one of youngest, most complete known
6. Ancient whale fall from Californias Ao Nuevo Island one of youngest, most complete known
7. 454 Sequencing: Science paper describes a novel, highly efficient method of sequencing ancient DNA
8. Newfound ancient African megadroughts may have driven the evolution of humans and fishes
9. Ancient amphibians left full-body imprints
10. Scientists melt million-year-old ice in search of ancient microbes
11. Ancient fish bones reveal impacts of global warming beneath the sea
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/22/2013)... May 22, 2013 Early screening for prostate cancer ... testing is for women, thanks to UC Irvine research ... Chemical Society . , After more than a decade ... to clearly identify clinically usable markers for prostate cancer ... far sooner, with greater accuracy and at dramatically lower ...
(Date:5/21/2013)... of "place" is increasingly being considered in the ... a new resource that can help them recognize ... the places in their lives. , Place-Based ... book co-edited by the Pacific Northwest Research Station,s ... approach to conservation. The book is published by ...
(Date:5/21/2013)... Cancers of all types become most deadly when they ... has reached this stage, it becomes very difficult for ... can develop. Now, researchers at the University of Missouri ... target lymphoma tumor cells wherever they may be in ... in the MU College of Veterinary Medicine, says being ...
Breaking Biology News(10 mins):UCI chemists devise inexpensive, accurate way to detect prostate cancer 2UCI chemists devise inexpensive, accurate way to detect prostate cancer 3MU researchers develop radioactive nanoparticles that target cancer cells 2
... PHILADELPHIA - A new animal model of nerve injury ... enzyme called Nmnat in nerve fiber maintenance and neuroprotection. ... clearing away damaged ones may offer scientists targets for ... Parkinson,s, as well as aid in situations of acute ...
... was not the only hominin on the block in northern ... researchers that included Johns Hopkins University geologist Naomi Levin has ... (such as an opposable big toe bone) that don,t match ... inhabit that region and considered by many to be the ...
... the Planet" declaration at a major gathering of experts on ... UN Summit Rio+20 in June. The declaration opens: ... system as it has supported the well-being of human civilization ... is growing that we have driven the planet into a ...
Cached Biology News:Penn biologists identify a key enzyme involved in protecting nerves from degeneration 2Penn biologists identify a key enzyme involved in protecting nerves from degeneration 3Newly discovered foot points to a new kid on the hominin block 2Planet under Pressure conference, London: Final statement 2Planet under Pressure conference, London: Final statement 3Planet under Pressure conference, London: Final statement 4Planet under Pressure conference, London: Final statement 5
(Date:5/22/2013)... 2013 The ability to sequence ... information they encode. There are now a suite ... of ribosome protected fragments) that dramatically expand our ... speakers include Dr. Jonathan Weissman, an Investigator with ... Hughes Medical Institute, who will present recent applications ...
(Date:5/21/2013)... , May 22, 2013 ... drug-only formulation of glycopyrronium bromide designed using Prosonix, particle ... company developing a portfolio of inhaled Respiratory Medicines ... study with PSX1002 that will assess its effect on ... doses in patients with moderate to severe chronic obstructive ...
(Date:5/21/2013)...  The Lindsley F. Kimball Research Institute of the New ... Grand Challenges Explorations winner, an initiative funded by the ... Sara Lustigman , Head of the Laboratory of Molecular ... project, titled Innovative 3-D in vitro culturing ... screen drugs to help eliminate onchocerciasis (river blindness) in ...
(Date:5/21/2013)... Through science fairs, workshops, kits for ... equipment, 25 organizations will continue their work to increase ... photonics in daily life with the aid of ... in 10 countries, are the first of two groups ... SPIE, the international society for optics and photonics , ...
Breaking Biology Technology:Monitoring Protein Synthesis One Codon at a Time Through Ribosome Profiling, a Webinar Hosted by Xtalks 2Prosonix Initiates Phase 2 Clinical Study with PSX1002 in Patients with Moderate to Severe Chronic Obstructive Pulmonary Disease (COPD) 2Prosonix Initiates Phase 2 Clinical Study with PSX1002 in Patients with Moderate to Severe Chronic Obstructive Pulmonary Disease (COPD) 3Prosonix Initiates Phase 2 Clinical Study with PSX1002 in Patients with Moderate to Severe Chronic Obstructive Pulmonary Disease (COPD) 4New York Blood Center's Research Institute Receives Grand Challenges Explorations Grant For Groundbreaking Research in Global Health and Development 2New York Blood Center's Research Institute Receives Grand Challenges Explorations Grant For Groundbreaking Research in Global Health and Development 3Learning About Light: Education Outreach Projects Funded in 10 Countries Through First Round of SPIE Grants 2Learning About Light: Education Outreach Projects Funded in 10 Countries Through First Round of SPIE Grants 3
... on Statistical Considerations for Model, Selection and Bias; Dr. Klaas ... ... Using Metadata, MOUNTAIN VIEW, ... leading provider of software and,strategic services for optimizing clinical drug ...
... 4 Six hospitals in,the north of England ... VAR ),software system that enables them to function ... Medical Oncology at hospitals in Lancashire and,Cumbria is ... by,fully integrating the prescribing, preparation, dispensing and,administration of ...
... soon be given a 39 day shelf life, according to ... for General Microbiologys 161st Meeting at the University of Edinburgh, ... ham has a maximum shelf life of three to four ... buying the sliced meat in a supermarket. Currently cooked ham ...
Cached Biology Technology:Pharsight to Present at ROeS Seminar in Bern, Switzerland on September 10 & 11, 2007 2Pharsight to Present at ROeS Seminar in Bern, Switzerland on September 10 & 11, 2007 3Six UK Hospitals Join Together in Using Varian Medical Oncology Information Network 2Six UK Hospitals Join Together in Using Varian Medical Oncology Information Network 3Cooked ham with a 39 day shelf life 2
AC input: 230 V...
A simple, sensitive and reliable method for determining free sulfhydryl content in peptides, protein...
... designed for stabilizing the coating biomolecules ... immunoassay development. It can stabilize ... and drying process and for long ... works as a blocking agent to ...
... Digital shaking water bath, with a ... baths and shaking water baths with seamless, ... comfort. The bright MULTI-DISPLAY (LED) indicating up ... across the lab. Advanced MICROPROCESSOR technology with ...
Biology Products: