Search for dissertations about: "duplication"
Showing result 1 - 5 of 145 swedish dissertations containing the word duplication.
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1. Variation in length of proteins by repeats and disorder regions
Abstract : Protein-coding genes evolve together with their genome and acquire changes, some of which affect the length of their protein products. This explains why equivalent proteins from different species can exhibit length differences. READ MORE
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2. The Human Y chromosome and its role in the developing male nervous system
Abstract : Recent research demonstrated that besides a role in sex determination and male fertility, the Y chromosome is involved in additional functions including prostate cancer, sex-specific effects on the brain and behaviour, graft-versus-host disease, nociception, aggression and autoimmune diseases. The results presented in this thesis include an analysis of sex-biased genes encoded on the X and Y chromosomes of rodents. READ MORE
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3. Evolution of the Neuropeptide Y and Opioid Systems and their Genomic Regions
Abstract : Two whole genome duplications (2R) occurred early in vertebrate evolution. By using combined information from phylogenetic analyses and chromosomal location of genes, this thesis delineates the evolutionary history of two receptor-ligand systems that expanded by these large scale events. READ MORE
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4. Evolution of Vertebrate Endocrine and Neuronal Gene Families : Focus on Pituitary and Retina
Abstract : The duplication of genes followed by selection is perhaps the most prominent way in which molecular biological systems gain multiplicity, diversity and functional complexity in evolution. Whole genome duplications (WGDs) therefore have the potential of generating an extraordinary amount of evolutionary innovation. READ MORE
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5. Evolution of mate signalling in moths: Biosynthetic gene families and diversification of female sex pheromones
Abstract : Pheromones are intraspecific chemical signals serving as a ubiquitous form of communication, particularly among insects. Female sex-pheromone signals act as the core constituent in the specialized odour-mediated moth mate-recognition system. Female moths typically release multicomponent mixtures of alcohols, aldehydes or acetates. READ MORE