Navigation Links
Does evolution select for faster evolvers?

It's a mystery why the speed and complexity of evolution appear to increase with time. For example, the fossil record indicates that single-celled life first appeared about 3.5 billion years ago, and it then took about 2.5 billion more years for multi-cellular life to evolve. That leaves just a billion years or so for the evolution of the diverse menagerie of plants, mammals, insects, birds and other species that populate the earth.

New studies by Rice University scientists suggest a possible answer; the speed of evolution has increased over time because bacteria and viruses constantly exchange transposable chunks of DNA between species, thus making it possible for life forms to evolve faster than they would if they relied only on sexual selection or random genetic mutations.

"We have developed the first exact solution of a mathematical model of evolution that accounts for this cross-species genetic exchange," said Michael Deem, the John W. Cox Professor in Biochemical and Genetic Engineering and professor of physics and astronomy.

The research appears in the Jan. 29 issue of Physical Review Letters.

Past mathematical models of evolution have focused largely on how populations respond to point mutations ?random changes in single nucleotides on the DNA chain, or genome. A few theories have focused on recombination ?the process that occurs in sexual selection when the genetic sequences of parents are recombined.

Horizontal gene transfer (HGT) is a cross-species form of genetic transfer. It occurs when the DNA from one species is introduced into another. The idea was ridiculed when first proposed more than 50 years ago, but the advent of drug-resistant bacteria and subsequent discoveries, including the identification of a specialized protein that bacteria use to swap genes, has led to wide acceptance in recent years.

"We know that the majority of the DNA in the genomes of some animal and plant species ?including
'"/>

Source:Rice University


Page: 1 2

Related biology news :

1. Molecular biology fills gaps in knowledge of bat evolution
2. Same mutation aided evolution in many fish species, Stanford study finds
3. Researchers trace evolution to relatively simple genetic changes
4. Family trees of ancient bacteria reveal evolutionary moves
5. Great White shark evolution debate involves WSU Lake Campus geology professor
6. Revolutionary nanotechnology illuminates brain cells at work
7. The evolutionary triumph of flower power
8. MicroRNAs play a big part in gene regulation - and evolution
9. Enlisting genomics to understand flu evolution
10. Variation in HIVs ability to disable host defenses contributes to rapid evolution
11. Scientists track stealth DNA elements in primate evolution
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Does evolution select for faster evolvers

(Date:3/24/2015)... , March 24, 2015   NexID Biometrics ... with critical security-authentication needs, today announced the beginning of ... (FFD) solution. The company, based in ... at the three-day Connect:ID Expo, which began here today ... NexID said version 2.0 of its SDK boosts the ...
(Date:3/23/2015)... NEW YORK , March 23, 2015   ... digital property management company, today announced that the Company ... platform for both enterprise and consumers at Connect:ID on ... D.C. HOYOS Labs will highlight the IEEE ... 1U TM ; and enterprise access control system. ...
(Date:3/20/2015)... , Mar. 20, 2015 Research and Markets ... addition of the "India Sensors Market Forecast ... The sensor market is projected to ... Consumer electronics, automotive, industrial and healthcare ... in the country. In addition, adoption of MEMS ...
Breaking Biology News(10 mins):NexID Begins Shipments Of Version 2.0 Fake-Finger-Detection Solution 2HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 2HOYOS Labs to Showcase Host of Biometrics Technologies at Connect:ID in Washington, D.C. 3India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 2India Sensors Market Forecast and Opportunities 2020 - STMicroelectronics held the largest share in 2014 3
... BioNano Genomics , the developer of the Irys™ System for genome ... , Ph.D. as vice president, Commercial Operations EMEA. Dr. Amini will ... possible for researchers and clinicians in Europe , ... to access BioNano,s recently launched Irys platform. "As ...
... C virus have only been partially successful. A major problem ... Dankook University, Yongin, Republic of Korea and his collaborators have ... critical protein, disabling it so successfully that no resistance has ... of the Journal of Virology . The ...
... over 15,000 species are threatened by extinction, and the ... surrounding some of the species behavior are resolved, more ... protection. The case of the loggerhead sea turtle is ... of kilometers to eventually come back to their place ...
Cached Biology News:BioNano Genomics Appoints Dr. Fahim Amini As Vice President Commercial Operations EMEA 2BioNano Genomics Appoints Dr. Fahim Amini As Vice President Commercial Operations EMEA 3Going home 2
(Date:4/23/2015)... Athena San Diego, an organization that ... in San Diego’s technology and life science sectors, will ... at their Gala on April 30, 2015 from 5-9pm ... http://athenasd.org/events/ , The Pinnacle Awards recognize individuals ... vision of fostering networking, risk taking and diversity of ...
(Date:4/23/2015)... 23, 2015 Six startups from ... April 4-17 as part of the U.S.-Russia Innovation ... group of biotechnology startups to participate in the ... (UNN) and the University of Maryland (UMD) signed ... their respective universities in the biomedical industry in ...
(Date:4/23/2015)... Calif. , April 23, 2015  Cryoport, ... advanced cryogenic logistics solutions for the life sciences ... established its cryogenic logistics solutions within the animal ... with Yancey Farms to support the shipment of ... German Sport horse Stallions. Animal ...
(Date:4/23/2015)... (PRWEB) April 23, 2015 ... in Personalized Medicine, is excited to announce the ... profile . This profile assesses 62 genetic variations ... dosing information for commonly prescribed non-opioid pain medications, ... name Neurontin), alprazolam (brand name Xanax) and acetaminophen ...
Breaking Biology Technology:Athena Pinnacle Awards to Honor Executives, Corporations and Educators Working to Promote Women Leaders 2U.S.-Russian Innovation Corridor Program Connects Visiting Russian Startups to U.S. Experts 2U.S.-Russian Innovation Corridor Program Connects Visiting Russian Startups to U.S. Experts 3U.S.-Russian Innovation Corridor Program Connects Visiting Russian Startups to U.S. Experts 4Cryoport to Support the Equine Animal Husbandry Market Through Agreement with Yancey Farms 2Cryoport to Support the Equine Animal Husbandry Market Through Agreement with Yancey Farms 3Proove Biosciences Launches World’s First Test to Predict Responders to Commonly Prescribed Non-Opioid Pain Medications 2Proove Biosciences Launches World’s First Test to Predict Responders to Commonly Prescribed Non-Opioid Pain Medications 3
... For future generations of Native Americans in Wisconsin, the ... corridors. , ,An effort to diversify Potawatomi tribe casino ... that has contributed to both the nation's technology industry ... Midwestern companiesan ethanol plant and an IT firmthe ...
... Organizers of Financial Executives International , a 15,000-peer ... committee members, has announced the formation of a local ... offers an opportunity for professional peers to share information ... finance. , ,"A handful of us realized that the ...
... fighting AT&T about Project Lightspeed and others are looking at ... these fiber investments have paid off in Utah as we ... don't hear much about in the Midwest. As one CIO ... 5 percent of buildings and homes worldwide have a broadband ...
Cached Biology Technology:Potawatomis to ramp up their investing 2Potawatomis to ramp up their investing 3Fiber-optic infrastructure spurring city economic development 2Fiber-optic infrastructure spurring city economic development 3Fiber-optic infrastructure spurring city economic development 4
... . The sensitive conductivity detector CE 4710, ... the measuring cell in a thermostatted environment. ... Data processing is provided by the CE 4900 ... high pressure CE 4100 dual piston pump. ...
... media and other fluid sources for 4 ... speed of each individual pump is controlled ... are exactly maintained. ,High-precision controlled peristaltic ... types, which allows flow rates between 0.01 ...
... cassette is designed to allow ampicillin selection ... gb2 driving the gene for ampicillin resistance ... Em7 promoter. It mediates higher transcription efficiency ... synthetic polyadenylation signal terminates the ampicillin expression. ...
... for the fast and simple integration of ... position (for the generation of transgenic mouse ... to allow neomycin / kanamycin selection in ... prokaryotic promoter (gb2) for expression of kanamycin ...
Biology Products: