Navigation Links
Evolutionary process more detailed than previously believed, study shows
Date:1/16/2009

to swell while once-dominant populations started to shrink. This constant reduction and burgeoning of populations signaled the development of multiple beneficial adaptations and a subsequent competition by the cells that acquired them, Kao said.

"Essentially, we were watching evolution in action," Kao said. "We're watching evolution in real time. We're actually seeing a mutation that shows these things have adapted and seeing their population thrive and expand from this adaptation. This is how evolution works.

"In one of our experiments we were able to see five independent population expansions. We had one adaptive mutation that allowed a population to expand, but before it was able to completely take over another un-mutated population of the same cells acquired a different mutation that allowed it to succeed and impede the expansion of the first population."

In addition to determining if and when a population acquired an adaptation, Kao also identified the specific adaptations that were acquired. She accomplished this using a DNA-based technology that enabled her to determine the specific locations on the genes of the yeast cells that expressed beneficial adaptations.

What she found was that as populations rise and fall, some of these beneficial adaptations factor into the continued evolution of the organism; others don't.

"Due to the possibility of this competition, beneficial mutations that have been lost during the evolution of an organism will not be identified from just the final generation of that organism," Kao explained. "Indeed, we found that several of the mutations were nearly lost in the population by the end of the experiment due to this competition."

In other words, as Mother Nature sorts things out, some adaptations go by the wayside, with the latest generation of an organism sometimes showing no traces of them.

"Think of this as another piece of the evolution puzzle," Kao said. "We're gaining a comprehensive understandin
'/>"/>

Contact: Katy Kao
Katy@chemail.tamu.edu
979-845-5571
Texas A&M University
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Scientists uncover evolutionary keys to common birth disorders
2. Evolution in action: Our antibodies take evolutionary leaps to fight microbes
3. Flies may reveal evolutionary step to live birth
4. Genetic based human diseases are an ancient evolutionary legacy
5. Details of evolutionary transition from fish to land animals revealed
6. Revealing the evolutionary history of threatened sea turtles
7. Illuminating biology: An evolutionary perspective
8. Milkweeds evolutionary approach to caterpillars: Counter appetite with fast repair
9. Revolutionary chefs? Not likely, shows physics research
10. Crossed (evolutionary) signals?
11. Mechanism and function of humor identified by new evolutionary theory
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/18/2014)... stressed they are often grouchy, grumpy, nasty, distracted or ... EPFL have just highlighted a fundamental synaptic mechanism that ... of social skills and cognitive impairment. When triggered by ... the brain. This was revealed by a work published ... team went to look for answers in a region ...
(Date:9/17/2014)... care to reproductive technologies, the justice and well-being ... people to identify key issues, articulate their values ... the most defensible ways forward. But what are ... conversations?, The Hastings Center and the Presidential Commission ... up to publish a series of essays to ...
(Date:9/17/2014)... 2014) A rare genetic disorder known as Jacobsen syndrome ... joint investigation by researchers at San Diego State University ... to suggesting better treatment options for people with Jacobsen ... genetic underpinnings of autism., Jacobsen syndrome affects approximately 1 ... Health. It occurs in a person when there is ...
Breaking Biology News(10 mins):How stress tears us apart 2Why bioethics literacy matters 2Why bioethics literacy matters 3A link between Jacobsen syndrome and autism 2
... Fla. Imagine a chemistry professor and a neuroscientist ... Alzheimer,s disease, or a biomedical engineer working with an ... the University of Florida, teamwork is often considered the ... than that, novel collaborations can inspire students who are ...
... The Howard Hughes Medical Institute (HHMI) today announced new ... undergraduate and precollege science education nationwide. The resources will ... most creative ideas by developing new ways to teach ... HHMI is making the awards through its Precollege and ...
... a popular species of game fish in Lake Erie are ... most comprehensive to date on mercury levels in Great Lakes ... a semi-monthly journal. Satyendra Bhavsar and colleagues note ... lakes in the world. The lakes are of significant economic ...
Cached Biology News:HHMI awards $1.2 million to UF for undergrad education 2HHMI awards $79 million for science education to research universities, top scientists 2HHMI awards $79 million for science education to research universities, top scientists 3HHMI awards $79 million for science education to research universities, top scientists 4HHMI awards $79 million for science education to research universities, top scientists 5
(Date:9/18/2014)... 2014  MEI Pharma, Inc. (Nasdaq: MEIP ), ... therapies for cancer, announced today that Daniel P. Gold ... BioCentury,s NewsMakers in the Biotech Industry conference on ... the Millennium Broadway Hotel & Conference Center in ... can be accessed at www.meipharma.com . A replay will ...
(Date:9/18/2014)... Pennsylvanie, 18 septembre 2014 Mapi, ... en 1974, a été depuis 40 ans ... évaluations cliniques traditionnelles par des évaluations recentrées ... sur les impacts économiques des traitements. ... A cours d,une récente conférence ...
(Date:9/18/2014)... (PRWEB) September 18, 2014 SeqLL ... Sequencing (tSMS™) technology, announced today the closing of ... investment, led by Genomic Diagnostic Technologies, will increase ... diagnostic applications. , Founded in March 2013 by ... Bioinformatics Analyst at Helicos BioSciences, SeqLL has continued ...
(Date:9/18/2014)... to weight loss and diabetes prevention, could actually hasten ... they do it in a surprising way: by changing ... the substantial population of bacteria residing in our intestines. ... humans, were published today in Nature . Among ... Institute,s Immunology Department, who led this research together with ...
Breaking Biology Technology:MEI Pharma To Present At BioCentury's NewsMakers Conference 2MEI Pharma To Present At BioCentury's NewsMakers Conference 31974 - 2014 - Mapi fête ses 40 ans 2SeqLL Closes Series-A Funding Round for Expansion of Single Molecule Sequencing 2Gut bacteria, artificial sweeteners and glucose intolerance 2Gut bacteria, artificial sweeteners and glucose intolerance 3
... April 4, 2012 Lixte Biotechnology Holdings, Inc. announced ... States Patent and Trademark Office for its lead histone ... Dr. John Kovach, founder and president of Lixte, ... of skin lymphomas and many other HDACi in various ...
... brain tumors with a combination of chemotherapy and radiation ... than two years after diagnosis. The effectiveness of the ... healthy brain tissue, which restricts chemotherapy access to the ... To address this challenge, researchers from the Georgia ...
... professor in the Department of Mechanical, Aerospace, and Nuclear ... Faculty Early Career Development Award (CAREER) from the National ... $500,000 award to further his research into the design ... CAREER Award is given to faculty members at the ...
Cached Biology Technology:Lixte Biotechnology Receives US Patent for Its Proprietary Histone Deacetylase Inhibitor 2Lixte Biotechnology Receives US Patent for Its Proprietary Histone Deacetylase Inhibitor 3Novel compound halts tumor spread, improves brain cancer treatment in animal studies 2Novel compound halts tumor spread, improves brain cancer treatment in animal studies 3Novel compound halts tumor spread, improves brain cancer treatment in animal studies 4Rensselaer professor Jie Lian receives NSF CAREER Award 2
Mouse monoclonal [3B6] to HSV1 + HSV2 ICP5 Major Capsid Protein ( Abpromise for all tested applications)....
Mouse monoclonal [SPM302] to BCAR1, prediluted ( Abpromise for all tested applications). entrezGeneID: 9564 SwissProtID: P56945...
...
p21 Ras Immunogen: Recombinant C-H-ras p21(val-12). Storage: 4 C...
Biology Products: