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Articles 1 - 5 of 5
Full-Text Articles in Life Sciences
The Effects Of Isolation On Endemic Cozumel Island Rodents: A Test Of The Island Rule, Brittany Marie Nuttall
The Effects Of Isolation On Endemic Cozumel Island Rodents: A Test Of The Island Rule, Brittany Marie Nuttall
Theses and Dissertations
Island isolation can cause changes in body size, cranial characteristics, and genetic variation in mammals. We use geometric morphometrics to test skull and mandible shape and size change across three species of endemic Cozumel Island rodents in order to test the “island rule” of larger size in isolated rodents. We also sequenced the D-Loop and cytochrome b region of the mitochondrial genome and tested for differences in genetic variation between island and mainland groups, as well as population structure and gene flow in order to assess the effect of island isolation on these three rodents. We found that the three …
Application Of Next-Generation Transcriptomic Tools For Non-Model Organisms: Gene Discovery And Marker Developmentwithin Plecoptera (Insecta), Nicholas Gregory Davis
Application Of Next-Generation Transcriptomic Tools For Non-Model Organisms: Gene Discovery And Marker Developmentwithin Plecoptera (Insecta), Nicholas Gregory Davis
Theses and Dissertations
Phylogenetic research on non-model organisms has been hindered by limited marker availability. Next generation sequencing techniques are eliminating that barrier. Using Illumina sequencing technology, Trinity assembly software, custom Perl reciprocal BLAST scripts, and Primer3 primer prediction software, we produced and analyzed 7 Plecopteran transcriptomes, representing 7 of the 16 total families, in an attempt to identify and develop conserved orthologous genetic markers. The transcriptomes were used to reconstruct a gene content phylogeny using a simple distance matrix generated from reciprocal blastn data. By producing and filtering a reciprocal blast network we identified and aligned over 450 putative orthologs. Out of …
Biogeography And Evolution Of Neotropical Small Mammals, With Emphasis On Hystricognath Spiny Rats Of The Genus Proechimys (Family Echimyidae), Rafael Do Nascimento Leite
Biogeography And Evolution Of Neotropical Small Mammals, With Emphasis On Hystricognath Spiny Rats Of The Genus Proechimys (Family Echimyidae), Rafael Do Nascimento Leite
Theses and Dissertations
The Neotropical region is the most biologically diverse region on the planet. The region encompasses a variety of ecosystems and has long been the target of researchers interested in patterns of species diversity and distribution. More recently, molecular data have been incorporated into methods for reconstructing the historical relationships among geographical areas and their biotas. Molecular phylogenetics has provided insights into diversification patterns and the influence of Late Cenozoic events on the evolutionary history of the region. Nevertheless, considering the vast extent and complexity of the region, more studies are needed to fully appreciate the patterns of biogeography and the …
Personhood And Cloning: Modern Applications And Ethics Of Stem Cell And Cloning Technology, Sariah Cottrell Mccarrey
Personhood And Cloning: Modern Applications And Ethics Of Stem Cell And Cloning Technology, Sariah Cottrell Mccarrey
Theses and Dissertations
Within many communities and religions, including the LDS community, there is some controversy surrounding the use of stem cells – particularly embryonic stem cells (ESC). Much of this controversy arises from confusion and misconceptions about what stem cells actually are, where they come from , and when life begins. The theology of the Church of Jesus Christ of Latter-day Saints has interesting implications for the last of these considerations, and it becomes less a question of “when does life begin” and more an exploration of “when does personhood begin” or “when does the spirit enter the body.” With no official …
Mitochondrial Genetics Of Alzheimer's Disease And Aging, Perry Gene Ridge
Mitochondrial Genetics Of Alzheimer's Disease And Aging, Perry Gene Ridge
Theses and Dissertations
Mitochondria are essential cellular organelles and the location of the electron transport chain, the site of the majority of energy production in the cell. Mitochondria contain their own circular genome approximately 16,000 base pairs in length. The mitochondrial genome (mtDNA) encodes 11 protein-coding genes essential for the electron transport chain, 22 tRNA genes, and two rRNA genes. Mitochondrial malfunction occurs in many diseases, and changes in the mitochondrial genome lead to numerous disorders. Multiple mitochondrial haplotypes and sequence features are associated with Alzheimer's disease. In this dissertation we utilized TreeScanning, an evolutionary-based haplotype approach to identify haplotypes and sequence variation …