HOME >> BIOLOGY >> NEWS
Does evolution select for faster evolvers?

HOUSTON, Jan. 29, 2007 -- 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 anim
'"/>

Contact: Jade Boyd
jadeboyd@rice.edu
713-348-6778
Rice University
29-Jan-2007


Page: 1 2

Related biology news :

1. Clones on task serve greater good, evolutionary study shows
2. New textbook illuminates the close links between evolutionary and molecular biology
3. Coelacanth fossil sheds light on fin-to-limb evolution
4. Genomics study provides insight into the evolution of unique human traits
5. New proteomics research promises to revolutionize biomedical discovery
6. Species detectives track unseen evolution
7. Study identifies energy efficiency as reason for evolution of upright walking
8. Clues to future evolution of HIV come from African green monkeys
9. Tumor painting revolutionizes fight against cancer
10. Revolutionary global environment fund announces $50M expansion
11. A first-principles model of early evolution

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Does evolution select for faster evolvers

(Date:11/21/2014)... VIEW, Calif. , Nov. 20, 2014 ... higher driver efficiency are piloting the North American and ... number of accidents growing, gesture recognition systems that are ... make a mark in the industry. ... the Automotive Gesture Recognition Market in Europe ...
(Date:11/18/2014)... 2014  The Secure Identity & Biometrics Association ... announce the formation of The Airport Entry and ... Identity and Biometric Entry and Exit Solutions Framework ... support from BORDERPOL, the international non-profit organization that ... expertise regarding border security, traveler and migration systems. ...
(Date:11/18/2014)... 2014   EyeLock Inc. , a market ... MorphoTrust USA (Safran), a leading U.S. provider ... strategic partnership to offer comprehensive biometric identity solutions ... airport screening and financial services markets. ... consumers through a nationwide network of 1,100 IdentoGO® ...
Breaking Biology News(10 mins):Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 2Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 3Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 4Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 2Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 3EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 2EyeLock, MorphoTrust Form Strategic Partnership to Pursue Commercial Enterprise Deployments 3
(Date:11/23/2014)... Francis, WI (PRWEB) November 23, 2014 ... manufacturer and supplier of fine chemical ingredients to ... announced the launch of its new website, Apiscent.com. ... description of Apiscent Labs, clean design, easy navigation, ... that make Apiscent Labs stand out. ...
(Date:11/22/2014)... November 21, 2014 Prominent academics, ... will gather on December 3rd at Genetic Rx, ... series. GeneticRx will take place at the Joseph ... and will discuss the present and future of ... skipping, and gene editing—as well as the treatment ...
(Date:11/22/2014)... IL (PRWEB) November 21, 2014 On ... competitors at the 2014 Emerging Medical Technologies Summit in ... Innovator Awards. Widely regarded among Silicon Valley investors ... medical device innovation, the win also positions Briteseed ... MedTech Innovator competition in 2015 and compete with other ...
(Date:11/22/2014)... 2014  The element of surprise has been a ... strike without warning. Until now, epidemiologists had nothing to ... outbreak, resulting in suboptimal responses to both the H1N1 ... Photo - http://photos.prnewswire.com/prnh/20141121/160242 ... because virus gene structural changes have been found that ...
Breaking Biology Technology:Pioneering Academics and Key Industry Leaders to Discuss Rare Diseases and the Emergence of New Genetic Medicines at Genetic Rx on December 3rd 2Insight Product Development Accelerator Member Wins MedTech Innovator Award Competition 2Insight Product Development Accelerator Member Wins MedTech Innovator Award Competition 3Viruses' Advantage of Surprise is Lost 2
Cached News: