Search for dissertations about: "chromosomes"
Showing result 16 - 20 of 326 swedish dissertations containing the word chromosomes.
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16. Splitting the sexes : The birth and senescence of sex chromosomes
Abstract : The evolution of gonochorism from hermaphroditism can be gradual by increasing investment in one sex role while decreasing in the other, or rapid through the fixation of sex-role sterility mutations, eventually leading to the evolution of sex chromosomes. It is expected that the transition will involve a temporary state of gynodioecy or androdioecy as the mutations are not expected to take place at the same time. READ MORE
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17. Advances in studying the role of genetic divergence and recombination in adaptation in non-model species
Abstract : Understanding the role of genetic divergence and recombination in adaptation is crucial to understanding the evolutionary potential of species since they can directly affect the levels of genetic variation present within populations or species. Genetic variation in the functional parts of the genome such as exons or regulatory regions is the raw material for evolution, because natural selection can only operate on phenotypic variation already present in the population. READ MORE
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18. Genomic and Peptidomic Characterization of the Developing Avian Brain
Abstract : Chicken and Japanese quail are commonly used models in developmental and sex specific neuroendocrine research. There is relatively little known about the mechanisms behind their sex specific brain development, especially regarding the impact of the sex chromosomes (male: ZZ, female ZW) in relation to gonadal hormones. READ MORE
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19. Speciation genomics in Ficedula flycatchers
Abstract : Understanding what evolutionary processes have shaped patterns of genomic differentiation between species is a major aim of speciation genomics. However, disentangling the role of different processes that generate similar patterns remains a substantial challenge. READ MORE
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20. Studies on the synthesis of chromosomes of bacterial DNA-viruses
Abstract : .... READ MORE