Kyle A Ferguson

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Defects in early meiotic events are thought to play a critical role in male infertility; however, little is known regarding the relationship between early meiotic events and the chromosomal constitution of human sperm. Thus, we analyzed testicular tissue from 26 men (9 fertile and 17 infertile men), using immunofluorescent techniques to examine meiotic(More)
BACKGROUND There is little information regarding the behaviour of the extra Y chromosome during meiosis I in men with 47,XYY karyotypes and the segregation of the sex chromosomes in sperm. We applied immunofluorescent and FISH techniques to study the relationship between the sex chromosome configuration in meiotic germ cells and the segregation pattern in(More)
BACKGROUND Male carriers of structural chromosomal abnormalities provide a useful model for studying the effects of impaired synapsis on human meioses and male fertility. METHODS We used immunofluorescent techniques to examine recombination (MLH1), synapsis (SYCP3/SYCP1) and transcriptional inactivation (BRCA1/gammaH2AX/RNA polymerase II) of meiotic(More)
Studies using gene-linkage analysis have suggested that abnormal recombination during meiosis may lead to the production of aneuploid gametes; however, there is little direct evidence of a link between the two in human males. We analysed spermatocytes in the pachytene stage from a man with extremely high aneuploidy rates in his sperm. Testicular tissue(More)
During meiosis, homologous chromosomes pair to facilitate the exchange of DNA at crossover sites along the chromosomes. The frequency and distribution of crossover formation are tightly regulated to ensure the proper progression of meiosis. Using immunofluorescence techniques, our group and others have studied the meiotic proteins in spermatocytes of(More)
Date The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. Thin, freely-suspended smectic liquid crystal films, due to their layered structure, provide an ideal system with which to study two dimensional(More)
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