Navigation Links
Woolly-mammoth gene study changes extinction theory
Date:6/11/2008

A large genetic study of the extinct woolly mammoth has revealed that the species was not one large homogenous group, as scientists previously had assumed, and that it did not have much genetic diversity. "The population was split into two groups, then one of the groups died out 45,000 years ago, long before the first humans began to appear in the region," said Stephan C. Schuster, associate professor of biochemistry and molecular biology at Penn State University and a leader of the research team. "This discovery is particularly interesting because it rules out human hunting as a contributing factor, leaving climate change and disease as the most probable causes of extinction." The discovery will be published later this week in the early online edition of the Proceedings of the National Academy of Sciences (PNAS).

The research marks the first time scientists have dissected the structure of an entire population of extinct mammal by using the complete mitochondrial genome -- all the DNA that makes up all the genes found in the mitochondria structures within cells. Data from this study will enable testing of the new hypothesis presented by the team, that there were two groups of woolly mammoth -- a concept that previously had not been recognized from studies of the fossil record.

The scientists analyzed the genes in hair obtained from individual woolly mammoths -- an extinct species of elephant adapted to living in the cold environment of the northern hemisphere. The bodies of these mammoths were found throughout a wide swathe of northern Siberia. Their dates of death span roughly 47,000 years, ranging from about 13,000 years ago to about 60,000 years ago.

Schuster and Webb Miller, professor of biology and computer science and engineering at Penn State, led the international research team, which includes Thomas Gilbert at the University of Copenhagen in Denmark and other scientists in Australia, Belgium, France, Ital
'/>"/>

Contact: Barbara K. Kennedy
science@psu.edu
814-863-4682
Penn State
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. From Canada to the Caribbean: Tree leaves control their own temperature, Penn study reveals
2. Study of guanacos launched in Chile
3. New study reveals large scale conservation essential
4. Study finds Chinese food good for your heart
5. Study identifies brain pathway that shuts down seizures
6. NOAA study shows eastern tropical pacific ocean dolphin populations improving
7. RAND study finds increase in piracy and terrorism at sea
8. Moores UCSD Cancer Center study links vitamin D, type 1 diabetes
9. UNH receives $380,000 grant to study organic dairy as closed ecosystem
10. Study finds healthy intestinal bacteria within chicken eggs
11. Study findings show infection control intervention helps keep kids in school
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Woolly-mammoth gene study changes extinction theory
(Date:5/5/2015)... 2015, NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" ... growing mobile commerce market, reminds investors and media that  Mr. ... presenting  at CARTES SECURE CONNEXIONS AMERICA 2015, held in ... The three-day conference is organized into a series of ... themed Global Fraud: Where is the Trust in Cyberspace? ...
(Date:4/20/2015)... April 20, 2015 Huntington Memorial Hospital is ... implant a new miniaturized, wireless monitoring sensor to manage ... first and only FDA-approved heart failure monitoring device that ... used by physicians to manage heart failure. ... implanted in the pulmonary artery (PA) during a non-surgical ...
(Date:4/13/2015)... 2015 According to a ... Market Forecast & Opportunities, 2020", the global biometrics market ... 14% till 2020. The biometrics market is garnering ... and review of biometric management systems. The constant ... with greater efficiency, are resulting in increasing installation ...
Breaking Biology News(10 mins):NXT-ID, Inc.'s CTO, David Tunnell, Presents at CARTES SECURE CONNEXIONS AMERICA 2015 Today in Washington DC. 2NXT-ID, Inc.'s CTO, David Tunnell, Presents at CARTES SECURE CONNEXIONS AMERICA 2015 Today in Washington DC. 3Huntington Memorial Hospital Becomes First in the San Gabriel Valley to Offer Patients a New Heart Failure Monitoring Solution 2Huntington Memorial Hospital Becomes First in the San Gabriel Valley to Offer Patients a New Heart Failure Monitoring Solution 3Global Biometrics Market to Cross US$ 21 Billion by 2020: TechSci Research 2
... major obstacle to HIV research is the virus,s exquisite specialisation ... like the humble lab mouse, can deliver only limited information. ... access Journal of Biology have made an ingenious ... key features of HIV infection without being infected with HIV. ...
... the Ocean,s most distinctive residents. ,Everyone wants to understand ... McComb from Florida Atlantic University. One possible reason is ... enhanced by their weird head shape, says McComb, giving ... to McComb, there were two schools of thought on ...
... are the bare essentials of life, the indispensable ingredients required ... Can we describe the molecular anatomy of a cell, and ... are just some of the questions that scientists in a ... Germany, and the Centre de Regulacio Genmica (CRG) in Barcelona, ...
Cached Biology News:A reductionist approach to HIV research 2Wide heads give hammerheads exceptional stereo view 2First-ever blueprint of a minimal cell is more complex than expected 2First-ever blueprint of a minimal cell is more complex than expected 3
(Date:5/21/2015)... /PRNewswire/ - SQI Diagnostics Inc. ("SQI" or the "Company") ... and commercializes proprietary technologies and products for advanced microarray ... the second fiscal quarter ended March 31, 2015. ... advance business with our existing customers and to develop ... CEO of SQI. "The delivery of a fully automated ...
(Date:5/21/2015)... 2015  Prima Biomed Ltd. (NASDAQ: PBMD ) ... become a leader in the development of immunotherapeutic products ... final CVac data from the Phase II CAN-003 ovarian ... a clinically meaningful improvement in Overall Survival ("OS") over ... In the group of second remission patients (n=20), ...
(Date:5/21/2015)... Germany (PRWEB) May 21, 2015 ... that its manufacturing facility in Worms, Germany has ... an independent subsidiary of the International Pharmaceutical Excipient ... Grace facilities that produce its SYLOID® FP brand ... received GMP certification, following the Curtis Bay, Maryland ...
(Date:5/21/2015)... , May 20, 2015 Research and Markets ... addition of the "2015 Global Survey on ... offering. The primary goal of this ... cytometry instruments and reagents. Key information the survey ... selection of flow cytometers, predominantly used applications for ...
Breaking Biology Technology:SQI Diagnostics Reports Second Quarter Financial Results 2SQI Diagnostics Reports Second Quarter Financial Results 3SQI Diagnostics Reports Second Quarter Financial Results 4SQI Diagnostics Reports Second Quarter Financial Results 5SQI Diagnostics Reports Second Quarter Financial Results 6SQI Diagnostics Reports Second Quarter Financial Results 7SQI Diagnostics Reports Second Quarter Financial Results 8Correction Continues after Big Move - BrokerBank Securities, Inc. 2Grace European Facility Receives GMP Excipient Certification for SYLOID® FP Silica Gel 2Global Survey on Flow Cytometry Adoption Trends 2015 2
... will have a new resource to help them navigate ... related centers on campus. , ,The Office of Corporate ... , which is to include events, publications and both ... to UW=-Madison faculty, staff and students. , ,Were one ...
... Santiago At the State University of New York in ... the campus that led to the creation of a $1.5 ... residence in Wisconsin, Santiago sees no reason why UW-Milwaukee can't ... this summer as the new chancellor of UW-Milwaukee, is determined ...
... Wis. The University of Wisconsin-Madison announced on Friday ... the field of stem-cell research. R. Timothy Mulcahy, a professor ... be leaving UW-Madison to become vice president of research at ... missed, graduate school Dean Martin Cadwallader said in a statement. ...
Cached Biology Technology:UW plans entrepreneurship program to link campus resources 2UW-Milwaukee Chancellor Santiago determined to build on research base 2UW-Milwaukee Chancellor Santiago determined to build on research base 3UW-Madison associate dean, active in stem cells, leaves 2
... pathway studies, protein-protein interaction studies, and ... on the flexible and powerful Paraflo ... are available as part of our ... Custom Probe Content Probe ...
... Arrays are intended for laboratory research use ... in neutral buffered formalin and embedded in ... performed by certified pathologists. Tissue cores ... relocated into a new recipient paraffin block, ...
... Mega Western Protein Array was developed using ... Protein Arrays are manufactured using high quality ... A protein sample from each of 30 ... Protein molecular weight marker on a large ...
... Using the New FAST(tm) Frame Multi-Slide Plate! ... designed to hold four, 16-pad FAST Slides ... a microplate footprint for high throughput processing ... standards recommended by the Society of Biomolecular ...
Biology Products: