Kooperativer Bibliotheksverbund

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Format: 1 streaming video file (56 min.) : , sound, color , 005605

Note: Retrieved April 17, 2024, from https://hstalks.com/bs/991/. , Introduction -- Diversity of animals -- How does diversity arise? -- Development and generation of new morphologies -- From egg to organism -- Use of model species in genetic studies -- Drosophila melanogaster (fruit fly) -- Normal fly vs. Ubx mutant -- Homeosis and homeotic -- Homeotic (Hox) genes -- Protein distribution of 4 Hox genes in a fly embryo -- Phenotype of Hox genes mutants -- Ubx expression pattern in Drosophila (1) -- Ubx expression pattern in Drosophila (2) -- Changes in Ubx expression in a mutant -- The central dogma -- Activity of regulatory DNA -- Conservation of homeotic genes -- Ubx mutants resemble other insects (1) -- Ubx mutants resemble other insects (2) -- Phylogenetic tree of insects -- Wings evolution in insects -- Three hyphotheses for Ubx evolution in insects -- Ubx expression pattern in different insects -- Ubx expression pattern in butterfly wings -- Forewings differ from hindwings in insects -- Manipulation of Ubx expression in butterflies -- Change in Ubx targets (1) -- Change in Ubx targets (2) -- Crustaceans -- Artemia -- Homeotic genes in Artemia -- Ubx expression pattern in Artemia -- Triops -- Crayfish -- Appendages morphology in mysid shrimp -- Scheme of Crustaceans diversity -- Possibility of homeotic transformation -- Ubx expression pattern in Mysidium -- Lobster -- Periclimenes -- Appendages evolution and Ubx expression -- Parhyale hawaiensis (beach scud) -- Characteristics of Parhyale hawaiensis -- Parhyale development -- Parhyale Hox expression domains (1) -- Parhyale Hox expression domains (2) -- Changing Ubx expression domains in Parhyale -- Wild-type vs. siRNA knockdown of Ubx -- Knockdown of Ubx gene using siRNA (1) -- Knockdown of Ubx gene using siRNA (2) -- Changing Ubx expression in Parhyale: conclusion -- What is responsible for the shift in Ubx expression -- Control of Hox genes expression in flies -- Hb represses Ubx -- Trans changes -- Cis changes -- Understanding Ubx expression in Crustaceans -- Transformation of Parhyale -- Understanding Ubx evolution (1) -- Understanding Ubx evolution (2) -- Results if "trans" evolution is correct -- Results if "cis" evolution is correct -- Hox genes and diversity: conclusion -- Potential role of Hox genes in vertebrates evolution -- Summary -- Acknowledgements (1) -- Acknowledgements (2).

Language: English