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| Articles about Mutation |
| Municipal Waste - Hazardous Mutation Live DVD [DVDrip] | | 2008-07-05 12:33:00 | | Artist - Municipal WasteAlbum - Hazardous Mutation DVDYear - 2006Genre - Thrash / Punk / Metal / CrossoverType - DVDripWeb - http://www.myspace.com/municipalwasteCountry - Virginia, USASource - DVDFormat - AVI (640X272)Size - 459 MB (Total: 5 Parts)Tracklist:1. The Wizard (Speech)2. Intro/Deathripper3. Drunk As Shit4. Mind Eraser5. Unleash The Bastards6. The Thrashing Of The Christ7. Sweet Attack8. Mutants Of War9. Accelerated Vision10. Blood Drive11. New Song12. Terror Shark13. Toxic Revolution14. Substitute Creature15. Waste 'Em All16. Bangover*Plus Band InterviewsDownload/Descargar'NOTE: Download all parts' | | By: The Last Disaster! | | |
| | | Humans walking on all fours linked to genetic mutation | | 2008-06-01 22:07:01 | | What are the genes implicated in upright walking of humans? The discovery of four families in which some members only walk on all fours (quadrupedality) may help us understand how humans, unlike other primates, are able to walk for long periods on only two legs, a scientist will tell the annual conference of the European Society of Human Genetics tomorrow (Monday 2 June).
read more | | By: Machines Like Us - Science and Technology News | | |
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| Gene mutation | | 2008-03-26 20:37:00 | | Mutations are changes to the nucleotide sequence of the genetic material of an organism. Mutations can be caused by copying errors in the genetic material during cell division, by exposure to ultraviolet or ionizing radiation, chemical mutagens, or viruses, or can occur deliberately under cellular control during processes such as hypermutation. In multicellular organisms, mutations can be subdivided into germ line mutations, which can be passed on to descendants, and somatic mutations, which are not transmitted to descendants in animals. Plants sometimes can transmit somatic mutations to their descendants asexually or sexually (in case when flower buds develop in somatically mutated part of plant). A new mutation that was not inherited from either parent is called a de novo mutation.Mutations create variations in the gene pool. Less favorable (or deleterious) mutations can be reduced in frequency in the gene pool by natural selection, while more favorable (beneficial or advantageous) m | | By: Biosolution | | |
| | | Evolution: Bacterial Mutation in Stationary Phase | | 2006-07-25 12:30:14 | | [After clicking on the above link, click on "Full Text"]Evolution: Bacterial Mutation in Stationary PhasePaul Sniegowski, Current Biology, March '04Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USAAbstract:A recent study indicates that the genomic mutation rate of the gut bacterium Escherichia coli is substantially higher in nongrowing than growing cultures. These findings are important in the light of the ongoing controversy over the generality and robustness of stationary phase mutagenesis and its evolutionary implications.Article Outline begins:The genomic mutation rate is a fundamental evolutionary parameter of any population, determining the rate of influx of new deleterious and beneficial alleles. Because most mutations are likely to be harmful to fitness, DNA repair and proofreading systems have probably evolved so as to minimize rates of mutation. Even the microbial extremophiles that normally inhabit harsh and potentially mutagenic environments seem to have low genomic mutation rates, suggesting that selection almost always puts a premium on the faithful maintenance and transmission of genetic information. Nonetheless, geneticists have long known that some environmental extremes can elevate mutation rates; indeed, this is the basis for the use of DNA damaging agents to induce mutations for study.[email if the link stops working]technorati tags: e.+coli, controversy, stationary, phase, mutagenesis, evolutionary, population, bacterium, alleles, dna, extremophiles, selection, mutations
| | By: Evolution Research - Main Blog | | |
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| Mutation and adaptation: the directed mutation controversy in evolutionary perspective | | 2006-03-12 13:02:26 | | [Lenski & Sniegowski, Annual Review of Systematics, Nov '95]Abstract:A central tenet of evolutionary theory is that mutation is random with respect to its adaptive consequences for individual organisms; that is, the production of variation precedes and does not cause adaptation. Several recent experimental reports have challenged this tenet by suggesting that bacteria (and yeast) ''may have mechanisms for choosing which mutations will occur'' (6, p. 142). The phenomenon of nonrandom mutation claimed in these experiments was initially called ''directed mutation'' but has undergone several name changes during its brief and controversial history. The directed mutation hypothesis has not fared well; many examples of apparently directed mutation have been rejected in favor of more conventional explanations, and several reviews questioning the validity of directed mutation have appeared (53, 54, 59-61, 79, 80). Nonetheless, directed mutation has recently been reincarnated under the confusing label ''adaptive mutation'' (5, 23, 24, 27, 35, 74). Here we discuss the many experimental and conceptual problems with directed/adaptive mutation, and we argue that the most plausible molecular models proposed to explain ''adaptive mutation'' are entirely consistent with the modern Darwinian concept of adaptation by natural selection on randomly occurring variation.In the concluding section of the paper, we discuss the importance of an informed evolutionary approach in the study of the potential adaptive significance of mutational phenomena. Knowledge of the molecular bases of mutation is increasing rapidly, but rigorous evolutionary understanding lags behind. We note that ascribing adaptive significance to mutational phenomena (for example, ''adaptive mutation'') is beset with some of the same difficulties as ascribing adaptive significance to features of whole organisms (29). We consider some examples of mutational phenomena along with possible adaptive and non | | By: Evolution Research - Main Blog | | |
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