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:10/17/2014)... news release is available in German . ... millions of sperms every day in order to reproduce? And ... are the topic of the latest issue of the research ... 2014). The evolutionary biologist Steven Ramm from Bielefeld University Bielefeld ... it is not unusual for a female to copulate with ...
(Date:10/16/2014)... a new synthesis of recent research findings to inform ... the two states. , The Ecology and Management ... A Synthesis of the Relevant Biophysical Science and Implications ... by the U.S. Forest Service,s Pacific Northwest Research Station, ... for a synthesis of the large body of scientific ...
(Date:10/16/2014)... -- NXT-ID, Inc. (NASDAQ: NXTD and ... focused on the growing mobile commerce market announces that ... Smart Wallet, at the 13 th annual Future ... conference on the intersection of technology and the economy. ... founder and publisher of the Strategic News Service™, the ...
Breaking Biology News(10 mins):Sperm wars 2New report synthesizes best available science on management of moist mixed-conifer forests 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 2NXT-ID Inc. to Present at 13th Annual FiRe Conference 3
... the United States by spending less money on making ... to the patients who need them, according to a ... and public health physician. , "For every dollar Congress ... treatments, it spends only one penny to ensure that ...
... sophisticated visual system than previously thought, according to a ... were able to solve complicated colour puzzles. The findings ... most difficult challenges of vision - namely, recognizing different ... that bees solve this problem using their experience with ...
... hear. Their brains learn to understand the artificial electrical ... sound. , A Stanford neurobiologist teamed with child-development specialists ... with cochlear implants were able to meld their newly ... In other words, did their brains process speech the ...
Cached Biology News:Access to existing medical treatments could save more lives than spending to improve the treatments 2Access to existing medical treatments could save more lives than spending to improve the treatments 3Bees solve complex colour puzzles 2Sooner is better with cochlear implants, Stanford scientist shows 2Sooner is better with cochlear implants, Stanford scientist shows 3
(Date:10/22/2014)... and HONG KONG , ... rare disease therapeutics enterprise, announced today that rare disease ... company as vice president, research. Dr. McKew brings more ... key leadership positions at the National Institutes of Health, ... acquisition by Wyeth). Dr. McKew will lead aTyr,s efforts to ...
(Date:10/20/2014)... 2014 Convey Computer , the ... from Iowa State University won first place in the ... Convey HC-2ex, the team’s solution achieved the highest overall ... the second place finisher. , Experts from all segments ... month long challenge, using a variety of design tools, ...
(Date:10/20/2014)... October 20, 2014 , A ... disorders and the delivery of care has revealed changing ... worrying inequalities in the provision of healthcare services across ... commissioned by United European Gastroenterology (UEG), have been announced ... public awareness of the burden of GI disorders across ...
(Date:10/20/2014)... N.J. (PRWEB) October 20, 2014 ... the Sidney Kimmel Cancer Center at Thomas Jefferson ... , Through the Strategic Alliance Partnership program, ... OncLive will collaborate to raise awareness of the ... treatment, and other projects. Clinicians and other health ...
Breaking Biology Technology:aTyr Pharma Appoints John C. McKew, Ph.D., as Vice President, Research 2aTyr Pharma Appoints John C. McKew, Ph.D., as Vice President, Research 3Team from Iowa State Wins 2014 MemoCODE Design Contest Using Convey HC-2ex 2Team from Iowa State Wins 2014 MemoCODE Design Contest Using Convey HC-2ex 3Major Survey Reveals Changing Trends and Inequalities in Healthcare Provision for Gastrointestinal Disorders Across Europe 2Major Survey Reveals Changing Trends and Inequalities in Healthcare Provision for Gastrointestinal Disorders Across Europe 3Major Survey Reveals Changing Trends and Inequalities in Healthcare Provision for Gastrointestinal Disorders Across Europe 4Major Survey Reveals Changing Trends and Inequalities in Healthcare Provision for Gastrointestinal Disorders Across Europe 5Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 2Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 3
... by Sapna Chacko , ... High quality, DEPC treated, and non-DEPC , treated water , ... , Available in sizes to suit all your , ... for RNA isolation and analysis can contribute to experimental , ...
... ... fastest, easiest, and most consistent method for PAGE purification of small ... which was designed for the visualization of small nucleic acids, ... the purification of RNA , and DNA. ...
... , , Orders of magnitude better ... , Perform DNA digestion and sample , ... Preserve RNA quality , ... the removal of contaminating genomic DNA from RNA samples in , ...
Cached Biology Technology:Which Water to Use? 2Which Water to Use? 3Which Water to Use? 4Which Water to Use? 5Which Water to Use? 6Ultra-Fast Purification of Small Nucleic Acids 2Ultra-Fast Purification of Small Nucleic Acids 3Ultra-Fast Purification of Small Nucleic Acids 4Ultra-Fast Purification of Small Nucleic Acids 5The Fastest, Simplest, and Most Effective Way to Remove DNA Contamination 2The Fastest, Simplest, and Most Effective Way to Remove DNA Contamination 3
No description available in Ensembl. Antigen: Recombinant Protein Epitope Signature Tag (PrEST)....
5(S)-HETE-d8 is used as an internal standard for the quantification of 5(S)-HETE by stable isotope dilution mass spectrometry....
Full-length cDNA clone CS0DJ013YG01 of T cells (Jurkat cell line) of Homo sapiens (human). [Source:Uniprot/SPTREMBL;Acc:Q86SZ3] Antigen: Recombinant Protein Epitope Signature Tag (PrEST)....
...
Biology Products: