Search for dissertations about: "Hans Ellegren"

Showing result 1 - 5 of 20 swedish dissertations containing the words Hans Ellegren.

  2. 1. Comparative Genomics in Birds

    Author : Erik Axelsson; Hans Ellegren; Martin Lercher; Uppsala universitet; []
    Keywords : Molecular genetics; Birds; molecular evolution; macrochromosomes; microchromosomes; mutation rate; substitution rate; base composition; positive selection; genetic drift; population size; Genetik;

    Abstract : To shed light on forces that shape the molecular evolution of bird genomes, and in turn avian adaptations, comparative analyses of avian DNA sequences are important. Moreover, contrasting findings in birds to those of other organisms will lend a clearer view on general aspects of molecular evolution. READ MORE

  4. 2. Gene Mapping in Ficedula Flycatchers

    Author : Niclas Backström; Hans Ellegren; Juha Merilä; Uppsala universitet; []
    Keywords : collared flycatcher; SNP; linkage disequilibrium; genetic map; pedigree;

    Abstract : In order to get full understanding of how evolution proceeds in natural settings it is necessary to reveal the genetic basis of the phenotypic traits that play a role for individual fitness in different environments. There are a few possible approaches, most of which stem from traditional mapping efforts in domestic animals and other model species. READ MORE

  5. 3. Evolution of MHC Genes and MHC Gene Expression

    Author : Karin Berggren Bremdal; Hans Ellegren; Jennifer Seddon; Philip Hedrick; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; major histocompatibilty complex; dog leukocyte antigen; balancing selection; linkage disequilibrium; promoter; diabetes mellitus; Canis familiaris; Canis lupus; Erinaceus europaeus; Erinaceus concolor; Genetics; Genetik; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

    Abstract : Polymorphism in coding regions and regions controlling gene expression is the major determinant of adaptive differences in natural populations. Genes of the major histocompatibility complex (MHC) possess a high level of genetic variation, which is maintained by selection over long coalescence times. READ MORE

  6. 4. The Effects of Mutation and Selection on the Rate and Pattern of Molecular Evolution in Birds

    Author : Sofia Berlin; Hans Ellegren; Adam Eyre-Walker; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecular genetics; substitution rate; diversity; selection; male mutation bias; birds; Genetik; Genetics; Genetik;

    Abstract : By comparing sequence diversity and divergence on sex chromosomes one can study how the rate of evolution in affected by mutation and/or selection. The rate of mutation in male biased, meaning that relatively more mutations are created in the male germ line than in the female. READ MORE

  7. 5. Rates and patterns of molecular evolution in avian genomes

    Author : Paulina Bolívar; Hans Ellegren; Carina F. Mugal; Mikkel Heide Schierup; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Molecular evolution; recombination; GC-biased gene conversion; Hill-Robertson interference; effective population size; dN dS; distribution of fitness effects; avian genomes; collared flycatcher; sex chromosomes; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

    Abstract : Evolution is the change in inherited characteristics of a population through subsequent generations. The interplay of several evolutionary mechanisms determines the rate at which this change occurs. READ MORE