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:4/15/2014)... research published in the March/April 2014 issue of ... shows whey protein, either as a supplement combined ... or weight-maintenance diet, may provide men and women benefits ... 14 randomized controlled trials with a total of 626 ... that used whey protein to replace calories in the ...
(Date:4/14/2014)... Rican climate over the past three decades have caused ... territory,s national animal. UCLA biologists have found that not ... call has also become shorter and higher pitched. ... of integrative biology and physiology and of ecology and ... the study examined 170 male coqui frogs ( Eleutherodactylus ...
(Date:4/14/2014)... the International Space Station inside the Dragon capsule ... in-orbit food production capabilities in more ways than ... for granted, fresh food. , NASA,s Veg-01 experiment ... and performance of a new expandable plant growth ... investigation will focus on the growth and development ...
Breaking Biology News(10 mins):New meta-analysis builds on the power of whey protein for improved body composition 2New meta-analysis builds on the power of whey protein for improved body composition 3Climate change a likely culprit in coqui frog's altered calls, say UCLA biologists 2Veggie will expand fresh food production on space station 2
... -- Dangerous disease often spreads faster than it takes ... researchers at Kansas State University have developed a test ... Sanjeev Narayanan, assistant professor, and Greg Peterson, research ... pathobiology, use a device called a DNA spotted microarray ...
... Ackermann and Wolf-Dietrich Hardt, in collaboration with Michael Doebeli ... have been able to describe how random molecular processes ... a self-destructive act to generate a greater common good, ... Survival strategy The biologists investigated this ...
... relapse after renewed drug administration are typical behavioral patterns ... the brain,s reward center are directly responsible for this. ... the Institute of Mental Health (ZI) in Mannheim, the ... University of Geneva, Switzerland, in the latest issue of ...
Cached Biology News:Rapid test for pathogens developed by K-State researchers 2ETH Zurich study on salmonella self-destruction 2ETH Zurich study on salmonella self-destruction 3Cocaine: How addiction develops 2
(Date:1/15/2014)... January 15, 2014 This webinar ... on nonclinical and clinical safety assessment in biosimilars. ... guide a path for biosimilar drug development, however ... of biosimilarity with regards to quality, safety and ... of biosimilar drug development and registration, development strategies ...
(Date:1/15/2014)... NC (PRWEB) January 15, 2014 ... an enhancement to its Online Web Portal for Life ... now have the ability to specify the subject matter ... nearly 50 life science sub-domains. This will help reduce ... and scientific fields, and decrease the likelihood of error. ...
(Date:1/14/2014)... Doylestown, PA (PRWEB) January 14, 2014 ... – 11 p.m. , Location: Warrington Country Club, 1360 ... Hepatitis B Foundation, the only national nonprofit organization solely ... improving the quality of life for those affected worldwide, ... 11 at Warrington Country Club in Warrington, Pa. ...
(Date:1/14/2014)... York, NY (PRWEB) January 14, 2014 ... initiated coverage of Alliqua, Inc. (OTCQB: ALQA). Alliqua ... and marketing proprietary products to serve the wound ... , In late 2012, Alliqua was restructured ... launched the company’s new strategy to become a ...
Breaking Biology Technology:Xtalks Life Sciences Webinar Examines Safety Assessment of Biosimilars 2DTS Improves Efficiency for Life Science Document Translations 2Hepatitis B Foundation to Host Annual Crystal Ball Gala 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3
... Stem cell-enriched autologous fat enables sustainable breast augmentation ... the media: For years a French company has been ... cause cancer. More than 100,000 women worldwide must now ... or carrying a "time bomb" in their bodies. Stem ...
... Biotherapeutics (OTC.BB: NWBO) (NW Bio) today announced that it will ... the Windsor Room of the Sir Francis Drake Hotel as ... emerging biotech companies held over 3 days this week in ... attendees are expected to be listening to presentations by up ...
... SEATTLE, Jan. 10, 2012  Omeros Corporation (NASDAQ: OMER ... selectively with each of GPR25, GPR32, GPR80, GPR135 and MAS1, ... unlocked by Omeros to 23, representing 30 percent of the ... unlocked by Omeros for drug development equals half of the ...
Cached Biology Technology:Silicone Scandal: Stem Cell Breast Augmentation a Safe Alternative 2NW Bio to Present Today at the OneMedForum SF 2012 Conference 2NW Bio to Present Today at the OneMedForum SF 2012 Conference 3Omeros Announces it has Unlocked 30 Percent of Class A Orphan GPCRs 2Omeros Announces it has Unlocked 30 Percent of Class A Orphan GPCRs 3Omeros Announces it has Unlocked 30 Percent of Class A Orphan GPCRs 4Omeros Announces it has Unlocked 30 Percent of Class A Orphan GPCRs 5
Anti-ACTH Immunogen: Porcine ACTH conjugated to BSA. Available Date: 38566...
Goat polyclonal to BACE1 ( Abpromise for all tested applications). entrezGeneID: 23621 SwissProtID: P56817...
... Immunogen: Peptide ... encompassing the human, mouse, and ... Accession Number: NM_000314 ... Routinely evaluated by immunoblot. ...
Mouse monoclonal [MN-8C4] to zona radiata ( Abpromise for all tested applications). Antigen: Purified eggshell proteins (zona radiata proteins and small amounts of zona pellucida proteins) from ...
Biology Products: