Sökning: "Ralf Janssen"

Hittade 5 avhandlingar innehållade orden Ralf Janssen.

  1. 1. Analysis of Wnt ligands and Fz receptors in Ecdysozoa : Investigating the evolution of segmentation

    Författare :Mattias Hogvall; Ralf Janssen; Graham Budd; Andreas Hejnol; Javier Ortega-Hernández; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Segmentation; Onychophora; Wnt genes; Frizzled; Hox genes; Priapulida; Biology with specialization in Evolutionary Organismal Biology; Biologi med inriktning mot evolutionär organismbiologi;

    Sammanfattning : .... LÄS MER

  3. 2. Investigation of Hox gene expression and Wnt-signalling in basally branching ecdysozoans

    Författare :Mattias Hogvall; Ralf Janssen; Graham Budd; Andreas Hejnol; Andrew Peel; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Wnt signalling pathway; Hox genes; Fz receptors; Onychophora; Priapulida; Ecdysozoa; Biology with specialization in Evolutionary Organismal Biology; Biologi med inriktning mot evolutionär organismbiologi;

    Sammanfattning : One of the most important processes in the development of an animal is the determination and patterning of the primary body axis, the anterior-posterior (AP) axis. After the AP axis has been established the embryo grows and elongates through posterior elongation. LÄS MER

  4. 3. Single-cell RNA sequencing as a tool to study panarthropod evolution

    Författare :Brenda Irene Medina Jimenez; Ralf Janssen; Graham Budd; Tatjana Haitina; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Single-cell RNA sequencing; EvoDevo; gene expression; tissue dissociation; cell capture; Biology with specialization in Molecular Biology; Biologi med inriktning mot molekylärbiologi; Biologi med inriktning mot molekylär evolution; Biology with specialization in Molecular Evolution;

    Sammanfattning : Panarthropoda is a monophyletic group comprised of arthropods and lobopods, molting animals with a segmented body, paired appendages, dorsal brain, and ventral nerve cords. Evolutionary Developmental Biology (EvoDevo) is an interdisciplinary field that seeks to understand how changes in development form the basis for variations in morphology and phenotypic evolution, including the genetic network underlying these processes. LÄS MER

  5. 4. Single-cell RNA sequencing provides novel insights into spider development and represents an innovative alternative to study the evolution and development of panarthropods

    Författare :Brenda Irene Medina-Jiménez; Ralf Janssen; Graham Budd; Angelika Stollewerk; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; panarthropod; spider embryo; single-cell RNA sequencing; EvoDevo; candidate gene approach; gene expression; cluster marker; Biology with specialization in Molecular Biology; Biologi med inriktning mot molekylärbiologi; Earth Science with specialization in Historical Geology and Palaeontology; Geovetenskap med inriktning mot historisk geologi och paleontologi;

    Sammanfattning : Panarthropoda is a monophyletic group of invertebrate animals with a segmented body, paired appendages, dorsal brain, and ventral nerve cords. In order to study the mechanisms underpining their evolution, I study the genetic factors that drive their development. LÄS MER

  7. 5. Aspects of priapulid development

    Författare :Sofia A Wennberg; Graham Budd; Lars Holmer; Ralf Janssen; Prpic Nikola; Uppsala universitet; []
    Nyckelord :Earth sciences; Priapulus caudatus; Priapulida; Ecdysozoa; larval development; embryology; Geovetenskap;

    Sammanfattning : The phylum Priapulida is a small group of marine worms that is allied with the nematodes, kinorhynchs, loriciferans and nematomorphs in a clade called the Cycloneuralia or Introverta. Together with the arthropods they are generally considered to comprise the Ecdysozoa, a clade of moulting animals. LÄS MER