Search for dissertations about: "Y chromosome"

Showing result 16 - 20 of 65 swedish dissertations containing the words Y chromosome.

  2. 16. ENVIRONMENTAL CONTAMINANTS AND SPERM Y:X CHROMOSOME RATIO. Impact of androgen- and dioxin-related effects in vivo and in vitro

    Author : Tarmo Tiido; Malmö Reproduktionsmedicin; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; AR; polymorphisms; Sertoli cell; endocrine disruption; inhibitory cross-talk; Biomedicinska vetenskaper; Biomedical sciences; AHR; sperm Y:X chromosome ratio; sex ratio; POPs; TCDD;

    Abstract : During the last decades, there has been concern that the environmental contaminants, such as POPs, may contribute to sex ratio changes in offspring of exposed populations. Accidental exposure to TCDD has been shown to be associated with fewer sons in men who were exposed in adolescence or earlier in life. READ MORE

  4. 17. Evolution of sex chromosomes in Sylvioidea songbirds

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

    Abstract : 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. READ MORE

  5. 18. Genetic Sex Differences in Early Human Neuronal Development : An Investigation in Embryo Tissue and Embryonic Stem Cells

    Author : Philipp Pottmeier; Elena Jazin; Armin Raznahan; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; sex chromosome; gametolog; x y homolog; male; female; sex differences; sex bias; embryonic stem cells; neurodevelopment; neuronal differentiation; neural stem cells; genetics; neurodevelopmental disorders; Biology with specialization in Evolutionary Organismal Biology; Biologi med inriktning mot evolutionär organismbiologi; Neuroscience; Neurovetenskap; Medicinsk genetik; Medical Genetics;

    Abstract : Sex differences in the human body affect many different organs and tissues, some of them have an effect on the human brain and its development. In the developing nervous system, sex differences can bias the number or functionality of neurons, glial cells or synapses. As a result, neural networks might develop with a sex-specific bias. READ MORE

  6. 19. The Human Y chromosome and its role in the developing male nervous system

    Author : Martin M. Johansson; David Skuse; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; MSY; sex differences; CNV; SNP; palindrome; palindromes; gr gr duplication; gr gr deletion; b2 b3 deletion; b2 b3 duplication; blue-grey duplication; blue-grey like duplication; IR2; U3; STS; AZFa; AZFb; AZFc; Olivary nucleus; Medulla oblongata; spinal cord; white matter; Affymetrix 6.0; embryo; embryonal; haplogroup; haplogroups; R1a; R1b; R-M207; E-M96; I-M170; J-M304; G-M201; Ashkenazi; Bolivian; Chinese; SNP array; padlock probing; AMY-tree; Biologi med inriktning mot zoologisk utvecklingsbiologi; Biology with specialization in Animal Development;

    Abstract : Recent research demonstrated that besides a role in sex determination and male fertility, the Y chromosome is involved in additional functions including prostate cancer, sex-specific effects on the brain and behaviour, graft-versus-host disease, nociception, aggression and autoimmune diseases. The results presented in this thesis include an analysis of sex-biased genes encoded on the X and Y chromosomes of rodents. READ MORE

  7. 20. Sperm Y:X chromosome ratio and androgen response in men exposed to environmental pollutants

    Author : Linus Kvist; Malmö Molekylärgenetisk reproduktionsmedicin; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Abstract : The last several decades have seen an increase in male infertility concomitant with a decline in the birth sex ratio. The conditions are believed to be linked to increased exposure to endocrine disrupting chemicals (EDCs), including the persistent organic pollutants or lifestyle factors e.g. smoking. READ MORE