Sökning: "chromosome 4"

Visar resultat 6 - 10 av 307 avhandlingar innehållade orden chromosome 4.

  1. 6. Evolution of sex chromosomes in Sylvioidea songbirds

    Författare :Hanna Sigeman; MEMEG; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sex chromosome; neo-sex chromosome; Birds; vertebrates; Genomics; Bioinformatics;

    Sammanfattning : Sex chromosomes were discovered more than 100 years ago. They have been studied intensely from a theoretical perspective since then, giving rise to a large body of testable predictions about their evolution from autosomes. LÄS MER

  3. 7. Splitting the sexes : The birth and senescence of sex chromosomes

    Författare :Aivars Cirulis; Evolutionär ekologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sex chromosome; Sexual conflict; Macrostomum lignano; Experimental evolution; Genomics of sex;

    Sammanfattning : The evolution of gonochorism from hermaphroditism can be gradual by increasing investment in one sex role while decreasing in the other, or rapid through the fixation of sex-role sterility mutations, eventually leading to the evolution of sex chromosomes. It is expected that the transition will involve a temporary state of gynodioecy or androdioecy as the mutations are not expected to take place at the same time. LÄS MER

  4. 8. Molecular alterations in squamous cell carcinomas of the skin : emphasis on genes on chromosome 9q

    Författare :Lena Eklund; Johan Hansson; Linköpings universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : Skin cancer is the most common type of cancer in the western world. The incidence of melanoma and non-melanoma skin cancer is continuously increasing and, in Sweden, 2300 new cases per year are diagnosed of squamous cell carcinoma (SCC) alone. LÄS MER

  5. 9. Prenatal diagnosis of structural malformations and chromosome anomalies : Detection, influence of Body Mass Index and ways to improve screening

    Författare :Eric Hildebrand; Marie Blomberg; Tomas Gottvall; Jan Brynhildsen; Ove Axelsson; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Introduction: Prenatal diagnosis of structural malformations and chromosome anomalies is possible in the presence of an effective screening with ultrasound during pregnancy. The continuous evolution of the ultrasound equipment facilitates the examination. LÄS MER

  7. 10. Chromosome-specific adaptations of RNA stability and the roles of the roX RNAs in dosage compensation

    Författare :Marie-Line Faucillion; Jan Larsson; Jean-Yves Roignant; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Drosophila melanogaster; dosage compensation; buffering; RNA stability; RNA decay; RNA half-life; RNA-seq; genome-wide; sex chromosomes; evolution; roX1; roX2; POF; MSL; molekylärbiologi; Molecular Biology;

    Sammanfattning : Sex chromosomes evolved from an ancient pair of autosomes and the Y chromosome lost most of its genetic information in the process. This created two kinds of genomic imbalances: the first one between males (XY) and females (XX) and the second one between the sex chromosomes and the autosomes (X:AA). LÄS MER