Search for dissertations about: "sex chromosomes"

Showing result 1 - 5 of 39 swedish dissertations containing the words sex chromosomes.

  1. 1. Sex chromosomes in willows

    Author : Pascal Pucholt; Sveriges lantbruksuniversitet.; [2016]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Sexual reproduction is found in most eukaryotes and has in the majority of animal species led to the evolution of separate sexes. In contrast, only 5-6% of all angiospersms are dioecious with female and male flowers on separate individuals. Interestingly, dioecy has evolved hundreds of times independently and at different timepoints in angiosperms. READ MORE

  2. 2. Mutation and Diversity in Avian Sex Chromosomes

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Hannah Sundström; Uppsala universitet.; [2003]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Genetics; mutation rate; diversity; sex chromosomes; indels; male bias; selective sweep; effective population size; birds; Genetik; MEDICINE Dermatology and venerology; clinical genetics; internal medicine Clinical genetics; MEDICIN Dermatologi och venerologi; klinisk genetik; invärtesmedicin Klinisk genetik;

    Abstract : Sex chromosomes are useful for the study of how factors such as mutation, selection, recombination and effective population size affect diversity and divergence.A comparison of gametologous introns in seven different bird species revealed a complete lack of diversity on the female-specific W chromosome. READ MORE

  3. 3. The evolution of sex chromosomes and sex-linked sequences in birds

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Homa Papoli Yazdi; Uppsala universitet.; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; sex chromosomes; female heterogamety; recombination suppression; genetic map; inversions; genetic diversity; pseudoautosomal region; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

    Abstract : Identifying the processes involved in the evolution of suppressed recombination between sex chromosomes and understanding their consequences for the evolutionary dynamics of sex-linked loci have been major topics of research during the last century. In this thesis, I used the avian ZW system, where females are the heterogametic sex, to investigate the underlying processes in sex chromosome evolution in birds. READ MORE

  4. 4. Ambivalent Ambiguity? A study of how women with 'atypical' sex development make sense of female embodiment

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Lisa Guntram; Linköpings universitet.; Linköpings universitet.; [2014]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Sex; sex development; ‘atypical’ sex development; female embodiment; adolescence; women; Sweden; uterine and vaginal agenesis; Turner syndrome; intersex; DSD; qualitative methodologies; sense-making; narratives; norms; normality; heteronormativity; resistance; relations; sexual practice; diagnosis; treatment; critique; Kön; könsutveckling; kvinnlig kroppslighet; ”otypisk” könsutveckling; normalitet; tonår; kvinnor; Sverige; MRKH syndrom; uterus och vaginal agenesi; Turner syndrom; intersex; DSD; meningskapande; relationer; kvalitativ metod; narrativ; normalitet; heteronormativitet; sexuell praktik; normer; ifrågasättande; diagnos; behandling; kritik;

    Abstract : Against a backdrop of feminist and social scientific research on sex, female embodiment, and normality this thesis aims to discern how young women, who in adolescence have learned that their bodies are developing in ways considered ‘atypical’ for the female sex, make sense of their bodies and their situation. In focus are the ways in which the women make sense of and negotiate female embodiment; how they, particularly in stories about their interactions with others, position their embodied selves; and how norms and beliefs about sexed embodiment, heterosexual practice, and in/fertility are strengthened and challenged in the interviewees’ sense-making. READ MORE

  5. 5. Genomic and Peptidomic Characterization of the Developing Avian Brain

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Birger Scholz; Uppsala universitet.; [2008]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Toxicology; Sex differentation; Sex determination; Sex chromosomes; Dosage Compensation; Genetic; Chickens; Coturnix; Gene Expression Profiling; Neuropeptides; Diencephalon; Toxikologi;

    Abstract : Chicken and Japanese quail are commonly used models in developmental and sex specific neuroendocrine research. There is relatively little known about the mechanisms behind their sex specific brain development, especially regarding the impact of the sex chromosomes (male: ZZ, female ZW) in relation to gonadal hormones. READ MORE