Navigation Links


ratchet in Biological Definition

Muller's ratchet

... In genetics , Muller 's ratchet is a hypothesis that explains how functionally ... considered a separate organism). Muller's ratchet applies to any deleterious mutation that occurs ... mutations resemble the operation of a ratchet , in that the organism can never go back. By ...

Endosymbiont

... complementary theory as to why the bacteria may have lost genes, Muller's ratchet , is that since the endosymbionts are maternally transmitted and have no ... journal. Nancy A. Moran (1996), Accelerated evolution and Muller’s ratchet in endosymbiotic bacteria, Proceedings of the National Academy of ...

Endosymbiont

... complementary theory as to why the bacteria may have lost genes, Muller's ratchet , is that since the endosymbionts are maternally transmitted and have no ... journal. Nancy A. Moran (1996), Accelerated evolution and Muller’s ratchet in endosymbiotic bacteria, Proceedings of the National Academy of ...

Mutational meltdown

... a downward spiral and will go extinct eventually. See also : Muller's ratchet Further reading W. Gabriel, M. Lynch, and R. Burger (1993). Muller's ratchet and mutational meltdowns. Evolution 47: 1744-1757. M. Lynch, R. ...

Fitness landscape

... rate is too high, or it may drift away from a peak it had already found. The process of drifting away from a peak is often referred to as Muller's ratchet . Fitness landscapes in evolutionary optimization Apart from the field of evolutionary biology, the concept of a fitness landscape has also ...

Genetic recombination

... unbalanced recombination. Enzymes called recombinases catalyze this reaction. Recombination is the mechanism by which organisms avoid Muller's ratchet . Contents showTocToggle("show","hide") 1 Crossing over 1.1 Chemistry of crossover 1.2 Consequences of crossover 1.3 ...

Population genetics

... Founder effect Genotype-phenotype distinction Hardy-Weinberg principle Microevolution Molecular evolution Muller's ratchet Mutational meltdown Population bottleneck Selection Small population size Ewens's sampling formula References J. ...
Other Contentsfontanellesadditivesadditivesadditivesadditivesadditivesguideguideguideguideguideguideguideguideguidefracturesfracturesfracturesfracturesfoodsfoodsfoodsfoodsfoodsfoodsforeskinforeskinfungalfungalfungalfungalfungalfungalfungal
(Date:11/4/2009)...n has received more than $10 million in research g...deral stimulus program, bringing thetotal amount o...23 million. Thirty-three projects achieved stimul... weather. , "The university has thoughtfully und...scholarly excellence to federal agency priorities....
(Date:11/4/2009)...wire-FirstCall/ -- Aware, Inc. (Nasdaq: AWRE ), a...etrics software, today reported financial results ... ,, Michael Tzannes, Aware,s Chairman and Chief...nced an agreement to sell our DSL and home network...ductor company being spun out of Infineon. This t...
(Date:11/4/2009)...-- Global Rainmakers, Inc., an intellectual proper..., today announced that the company has exited its ...ialize its suite of technologies designed to lever..., During the past four years, the company has spe...oy a series of core--but expandable--technologies ...
Breaking Biology News(10 mins):OU achieves $10 million in stimulus grants for 33 projects on the Norman campus 2OU achieves $10 million in stimulus grants for 33 projects on the Norman campus 3Aware, Inc. Reports Third Quarter 2009 Financial Results 2Aware, Inc. Reports Third Quarter 2009 Financial Results 3Aware, Inc. Reports Third Quarter 2009 Financial Results 4Aware, Inc. Reports Third Quarter 2009 Financial Results 5Aware, Inc. Reports Third Quarter 2009 Financial Results 6Aware, Inc. Reports Third Quarter 2009 Financial Results 7Global Rainmakers Brings Cutting-Edge Biometric Security Products to Reality 2Global Rainmakers Brings Cutting-Edge Biometric Security Products to Reality 3Peregrine Pharmaceuticals Licenses Anti VEGF Antibodies to Affitech 13142 1Peregrine Pharmaceuticals Licenses Anti VEGF Antibodies to Affitech 13142 2Peregrine Pharmaceuticals Licenses Anti VEGF Antibodies to Affitech 13142 3Peregrine Pharmaceuticals Licenses Anti VEGF Antibodies to Affitech 13142 4Peregrine Pharmaceuticals Licenses Anti VEGF Antibodies to Affitech 13142 5GSK Improving Performance to Continue in Second Half 52381 1Red Mango Introduces the First Probiotic Iced Tea July 27 52379 1Red Mango Introduces the First Probiotic Iced Tea July 27 52379 2Red Mango Introduces the First Probiotic Iced Tea July 27 52379 3Red Mango Introduces the First Probiotic Iced Tea July 27 52379 4
(Date:11/8/2009)...y does not mean the battle is won," said Dr. Charm...USNewswire/ -- In a vote of 240-194, the Stupak-El...ndment to prohibit abortion mandates and funding i...ns United for Life Action President and CEO Dr. Ch... is a victory for the pro-life Americans across th...
(Date:11/8/2009)...Nov. 7 USAction this ev... for America Act, which will make health care more...s accountable and increase access to health care f...,, "Teddy Roosevelt, FDR and Harry Truman would...arney. "Today,s vote ranks among our country,s pro...
(Date:11/8/2009)...wift Passage of H.R. 3961 to Secure the Stability ...ewswire/ -- Statement Attributable to: J. James Ro...n. ,, (Logo: http://www.newscom.com/cgi-bin/p...passage of the House health reform bill, which wil...physicians and calls for swift passage of H.R. 396...
(Date:11/8/2009)...s House Passage of Health Care Reform Bill ,, ...mprove coverage for all Americans ,, CHICAGO, ...d States House of Representatives passed by a vote...on that would strengthen Medicare for seniors and ...ces millions of Americans out of affordable health...
(Date:11/8/2009)...s House Passage of Health Care Reform Bill ,, ...mprove coverage for all Americans ,, BALTIMORE...ight the United States House of Representatives pa...would strengthen Medicare for seniors and end disc...ions of Americans out of affordable health coverag...
Breaking Medicine News(10 mins):Health News:Americans United for Life Action Comments on Passage of Pro-Life Amendment: Bipartisan Pro-life Majority Reflects the Will of the American People 2Health News:AMA Hails House Passage of Health Reform Bill (H.R. 3962) 2Health News:AARP Illinois Key Vote News Alert 2Health News:AARP Illinois Key Vote News Alert 3Health News:AARP Maryland Key Vote News Alert 2Health News:AARP Maryland Key Vote News Alert 3
Other TagsFailingCommitteeCambodiaPopularActressEasternEasternPediatricPediatricPediatricOther Tagswound 2wound 3wound 4wound 5wound 6delayed 2delayed 3delayed 4delayed 5delayed 6delayed 7delayed 8delayed 9delayed 10arthritic 2lessen 2lessen 3lessen 4lessen 5lessen 6contaminants 2