the neutral theory of molecular evolution

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The Neutral Theory Of Molecular Evolution

Author : Motoo Kimura
ISBN : 9781139935678
Genre : Science
File Size : 61. 48 MB
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Motoo Kimura, as founder of the neutral theory, is uniquely placed to write this book. He first proposed the theory in 1968 to explain the unexpectedly high rate of evolutionary change and very large amount of intraspecific variability at the molecular level that had been uncovered by new techniques in molecular biology. The theory - which asserts that the great majority of evolutionary changes at the molecular level are caused not by Darwinian selection but by random drift of selectively neutral mutants - has caused controversy ever since. This book is the first comprehensive treatment of this subject and the author synthesises a wealth of material - ranging from a historical perspective, through recent molecular discoveries, to sophisticated mathematical arguments - all presented in a most lucid manner.

Population Genetics Molecular Evolution And The Neutral Theory

Author : Motoo Kimura
ISBN : 0226435628
Genre : Science
File Size : 31. 9 MB
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One of this century's leading evolutionary biologists, Motoo Kimura revolutionized the field with his random drift theory of molecular evolution—the neutral theory—and his groundbreaking theoretical work in population genetics. This volume collects 57 of Kimura's most important papers and covers forty years of his diverse and original contributions to our understanding of how genetic variation affects evolutionary change. Kimura's neutral theory, first presented in 1968, challenged the notion that natural selection was the sole directive force in evolution. Arguing that mutations and random drift account for variations at the level of DNA and amino acids, Kimura advanced a theory of evolutionary change that was strongly challenged at first and that eventually earned the respect and interest of evolutionary biologists throughout the world. This volume includes the seminal papers on the neutral theory, as well as many others that cover such topics as population structure, variable selection intensity, the genetics of quantitative characters, inbreeding systems, and reversibility of changes by random drift. Background essays by Naoyuki Takahata examine Kimura's work in relation to its effects and recent developments in each area.

The Causes Of Molecular Evolution

Author : John H. Gillespie
ISBN : 0195357744
Genre : Science
File Size : 40. 60 MB
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This work provides a unified theory that addresses the important problem of the origin and maintenance of genetic variation in natural populations. With modern molecular techniques, variation is found in all species, sometimes at astonishingly high levels. Yet, despite these observations, the forces that maintain variation within and between species have been difficult subjects of study. Because they act very weakly and operate over vast time scales, scientists must rely on indirect inferences and speculative mathematical models. However, despite these obstacles, many advances have been made. The author's research in molecular genetics, evolution, and bio-mathematics has enabled him to draw on this work, and present a coherent and valuable view of the field. The book is divided into three parts. The first consists of three chapters on protein evolution, DNA evolution, and molecular mechanisms. This section reviews the experimental observations on genetic variation. The second part gives a unified treatment of the mathematical theory of selection in a fluctuating environment. The final two chapters combine the earlier assessments in a treatment of the scientific status of two competing theories for the maintenance of genetic variation. Steeped in the enormous advances population genetics has made over the past 25 years, this book has proven highly popular among human geneticists, biologists, evolutionary theorists, and bio-mathematicians.

Molecular Evolution Protein Polymorphism And The Neutral Theory

Author : Motoo Kimura
ISBN : UCSD:31822005114046
Genre : Evolution
File Size : 65. 51 MB
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Non Neutral Evolution

Author : Brian Golding
ISBN : 9781461523833
Genre : Science
File Size : 84. 33 MB
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All organisms--from the AIDS virus, to bacteria, to fish, to humans--must evolve to survive. Despite the central place of evolution within biology, there are many things that are still poorly understood. For Charles Darwin, the driving force behind all evolution was natural selection. More recently, evolutionary biologists have considered that many mutations are essentially neutral with respect to natural selection. Many questions remain. Are molecular differences between species adaptive? Are differences within species adaptive? Modern biotechnology has enabled us to identify precisely the actual DNA structure from many individuals within a population, and thus to see how these DNA sequences have changed over time and to answer some of these questions. At the same time, this knowledge poses new challenges to our ability to understand the observed patterns. This exciting volume outlines the biological problems, provides new perspectives on theoretical treatments of the consequences of natural selection, examines the consequences of molecular data, and relates molecular events to speciation. Every evolutionary biologist will find it of interest.

Microbial Population Genetics

Author : Jianping Xu
ISBN : 9781904455592
Genre : Science
File Size : 32. 21 MB
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Microbial population genetics is a rapidly advancing field of investigation with relevance to many areas of science. The subject encompasses theoretical issues, such as the origins and evolution of species, sex, and recombination. Population genetics lays the foundations for tracking the origin and evolution of antibiotic resistance and deadly infectious pathogens and is also an essential tool in the utilization of beneficial microbes. This invaluable book, written by leading researchers in the field, details the current major advances in microbial population genetics and genomics. Distinguished international scientists introduce fundamental concepts, describe genetic tools, and comprehensively review recent data from SNP surveys, whole-genome DNA sequences, and microarray hybridizations. The chapters cover broad groups of microorganisms including viruses, bacteria, archaea, fungi, protozoa, and algae. A major focus is the application of molecular tools in the study of genetic variation. Topics covered include microbial systematics, comparative microbial genomics, horizontal gene transfer, pathogenic bacteria, nitrogen-fixing bacteria, cyanobacteria, microalgae, fungi, malaria parasites, viral pathogens, and metagenomics. Microbial Population Genetics is an essential volume for everyone interested in population genetics, and it is highly recommended reading for all microbiologists.

Mutation Driven Evolution

Author : Masatoshi Nei
ISBN : 9780191637827
Genre : Science
File Size : 85. 92 MB
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The purpose of this book is to present a new mechanistic theory of mutation-driven evolution based on recent advances in genomics and evolutionary developmental biology. The theory asserts, perhaps somewhat controversially, that the driving force behind evolution is mutation, with natural selection being of only secondary importance. The word 'mutation' is used to describe any kind of change in DNA such as nucleotide substitution, gene duplication/deletion, chromosomal change, and genome duplication. A brief history of the principal evolutionary theories (Darwinism, mutationism, neo-Darwinism, and neo-mutationism) that preceded the theory of mutation-driven evolution is also presented in the context of the last 150 years of research. However, the core of the book is concerned with recent studies of genomics and the molecular basis of phenotypic evolution, and their relevance to mutation-driven evolution. In contrast to neo-Darwinism, mutation-driven evolution is capable of explaining real examples of evolution such as the evolution of olfactory receptors, sex-determination in animals, and the general scheme of hybrid sterility. In this sense the theory proposed is more realistic than its predecessors, and gives a more logical explanation of various evolutionary events. Mutation-Driven Evolution is suitable for graduate level students as well as professional researchers (both empiricists and theoreticians) in the fields of molecular evolution and population genetics. It assumes that the readers are acquainted with basic knowledge of genetics and molecular biology.

Fundamentals Of Molecular Evolution

Author : Wen-Hsiung Li
ISBN : 0878934529
Genre : Science
File Size : 25. 3 MB
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Gene structure and mutation. Protein-coding genes. RNA-specifying genes. Regulatory genes. Nucleotide substitutions. Deletions and insertions. Spatial distribution of mutations. Dynamics of genes in populations. Changes in allele frequencies. Natural selection. Codominance. Overdominance. Random genetic drift. Effective population size. Gene substitution. Fixation probability. Fixation time. Rate of gene substitution. Genetic polymorphism. The neo-darwinian theory and the neutral mutation hypothesis. Evolutionary change in nucleotide sequences. Jukes and cantor's one-parameter model. Kimura's two-parameter model. Number of substitutions between two noncoding sequences. Protein-coding. Alignment of nucleotide and amino acid sequences. The dot-matrix method. The sequence-distance method. Indirect estimation of the number of nucleotide substitutions. Restriction endonuclease fragment patterns and site maps DNA-DNA hybridization. Rates and patterns of nucleotide substitution. Variation among different gene regions. A case of positive selection: lysozyme in cows and langurs. Relative-rate tests. Nearly equal rates in mice and rats. Lower rates in humans than in monkeys. Higher rates in rodents than in primates. Causes of variation in substitution rates among evolutionary lineages. Organelle. Pseudogenes. Nonrandom usage of synonymous codons. Phylogeny. Impact of molecular data on phylogenetic studies. Rooted and unrooted trees. True and inferred trees. Gene trees and species trees. Unweighted pair group method with arithmetic mean (UPGMA). Transformed distance method. Neighbors relation methods. Maximum parsimony methods. Phenetics versus cladistics. Estimation of branch lengths. Rooting unrooted trees. Estimation of species-divergence times clades. Phylogeny of humans and apes. Endosymbiotic origin of mitochondria and chloroplasts. Molecular paleontology. The dusky seaside sparrow: a lesson in conservation biology. Evolution by gene duplication and exon shuffling. Domain duplication and gene elongation. The ovomucoid gene. Formation of gene families and the acquisition of new functions. RNA-specifying genes. Isozymes. Color-sensitive pigment proteins. The globin superfamily of genes. Exon shuffling. Mosaic proteins. Phase limitations on exon shuffling. Alternative pathways for producing new functions. Overlapping genes. Alternative splicing. Gene sharing. Concerted evolution of multigene families. Mechanisms of concerted evolution. Evolution by transposition. Transposable elements. Transposons. Retroelements. Retrosequences. Retrogenes. Processed pseudogenes. Effects of transposition on the host genome. Hybrid dysgenesis. Horizontal transfer of virogenes from baboons to cats. Drosophila. Genome organization and evolution. Genome size of eukaryotes and the C-value paradox. Mechanisms for increasing genome size. Chromosomal duplication. Maintenance of nongenic DNA. Bacteria. Compositional organization of the vertebrate genome. Origins of isochores.

Darwinian Detectives

Author : Norman A. Johnson
ISBN : 0198041896
Genre : Science
File Size : 34. 63 MB
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Biology is often viewed today as a bipartisan field, with molecular level genetics guiding us into the future and natural history (including ecology, evolution, and conservation biology,) chaining us to a descriptive scientific past. In Darwinian Detectives, Norman Johnson bridges this divide, revealing how the tried and true tools of natural history make sense of the newest genomic discoveries. Molecular scientists exploring newly sequenced genomes have stumbled upon quite a few surprises, including that only one to ten percent of the genetic material of animals actually codes for genes. What does the remaining 90-99% of the genome do? Why do some organisms have a much lower genome size than their close relatives? What were the genetic changes that were associated with us becoming human? As molecular biologists uncover these and other new mysteries, evolutionary geneticists are searching for answers to such questions. Norman Johnson captures the excitement of the hunt for our own genetic history. Through lively anecdotes, he explores how researchers detect natural selection acting on genes and what this genetic information tells us about human origins.

Bertrand Russell And The Origins Of The Set Theoretic Paradoxes

Author : GARCIADIEGO
ISBN : 9783034874021
Genre : Philosophy
File Size : 33. 29 MB
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Xll Russell's published works include more than sixty books, several unpublished manuscripts, many hundreds of articles, dozens of radio and TV interviews and films, covering a wide spectrum of knowledge. His writings embrace discussions and analysis of such diverse topics as social sciences, foundations of mathematics, philosophy of physics, philosophy in general, religion, moral sciences, education, pacifism, natural sciences (including biology and physics), linguistics, statistics, probability, eco nomic theory, history, politics, international affairs and other topics. He corresponded with a large and diverse group of colleagues including both prominent and obscure figures in politics, the arts, humanities and scienc es. Russell's communication with his colleagues began in the late nine teenth century and was especially active through much of the twentieth century. In spite of being one of the most controversial public personali ties of his day (let us not forget that he went to prison twice, was dis missed from Cambridge University and was prevented from teaching at the College of the City of New York), his merits have been recognized and appreciated. He was awarded many medals, diplomas and honors, including the Nobel Prize for Literature in 1950.

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