Sökning: "oogenesis"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet oogenesis.

  1. 1. Developmental and Reproductive Toxicity of Progestagens in the Xenopus (Silurana) tropicalis Test System

    Författare :Moa Säfholm; Cecilia Berg; Ingvar Brandt; Jan Olsson; Louis Guillette; Uppsala universitet; []
    Nyckelord :Xenopus tropicalis; sex organ differentiation; oogenesis; fertility; ovary; oviduct; progestagens; Biologi med inriktning mot ekotoxikologi; Biology with specialization in Environmental Toxicology;

    Sammanfattning : Progestagenic compounds are emerging contaminants found in surface and ground water around the world. Information on the effects and potency of progestagens is needed in order to understand the environmental risks posed by these compounds. LÄS MER

  3. 2. Sex, Molecules, and Gene control : Ecophysiological and evolutionary aspects of key sponge species from Antarctic shallow waters and the deep sea

    Författare :Vasiliki Koutsouveli; Paco Cárdenas; Anders Backlund; Ana Riesgo; Cassandra G. Extavour; Uppsala universitet; []
    Nyckelord :Porifera; Demospongiae; Geodia spp.; Phakellia ventilabrum; reproduction; gametogenesis; Antarctica; deep sea; sponge grounds; histology; molecular machinery; electron microscopy; RNA-seq; proteomics; lipidomics; Farmakognosi; Pharmacognosy;

    Sammanfattning : Very little is known about the ecophysiological aspects of Porifera (sponges) from Antarctica and North Atlantic, even though they are keystone components of these habitats. Being the earliest diverging metazoan lineage, sponges also play a fundamental role in our understanding of animal evolution. LÄS MER

  4. 3. Evolution of asexuality in insects : Polyploidy, hybridization and geographical parthenogenesis

    Författare :Magnus Lundmark; Anssi Saura; Anders Nilsson; Davis Parker; Umeå universitet; []
    Nyckelord :Molecular genetics; weevils; geographical parthenogenesis; hybridization; polyploidy; Genetik; Otiorhynchus; Genetics; genetik;

    Sammanfattning : Asexual reproduction and polyploidy are relatively rare in animals with chromosomal sex determination and always represent a derived condition. To accomplish asexual reproduction several changes in gene expression are required in the mechanism of oogenesis. LÄS MER

  5. 4. Sex and symbionts : New discoveries in local and regional patterns of coral ecology and reproduction

    Författare :Micaela Hellström; Michael Tedengren; Mats Grahn; John A. H. Benzie; Nancy Knowlton; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Indo-Pacific; S. elegans; G. fascicularis; Symbiodinium; size; reproduction; allozymes; ITS2; mtDNA; geography; environment; Marine ecology; Marin ekologi; marin ekotoxikologi; Marine Ecotoxicology;

    Sammanfattning : Coral reefs belong to the most diverse and the most threatened ecosystems on earth. Anthropogenic stressors and climate change have led to mortalities at levels unprecedented in modern times. The aims of this thesis are to investigate aspects of the corals’ ability to reproduce, disperse, adapt and survive. LÄS MER

  7. 5. The function of Smc5/6 in Drosophila development and at the heterochromatin-like locus HMR in budding yeast

    Författare :Martin Tran; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The structural maintenance of chromosome 5/6 (Smc5/6) complex is one out of many factors in the cell that maintain genome stability. Smc5/6 has been implicated in processes such as DNA double-strand break (DSB) repair, replication progression, and chromosome segregation. LÄS MER