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Les effects cytogénétiques des composés alkane sulfonates d'alkylMoutschen, Jean. January 1964 (has links)
Thèse--Liège. / Includes bibliography.
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X-inactivation in human femalesWilliams, Pamela Foss. January 1977 (has links)
Thesis--Wisconsin. / Includes bibliographical references (leaves 69-85).
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Studies on human chromosome satellite associationHemel, Jan Oscar van, January 1971 (has links)
Proefschrift: Rijksuniversiteit te Utrecht. / "Stellingen" (2 p.) and vita inserted. Summary and afterword in Dutch. Bibliography: p. 64-69.
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The effects of enzymes on the fine structure of lampbrush chromosomesSapp, Walter James. January 1964 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1964. / eContent provider-neutral record in process. Description based on print version record. Bibliography: l. 27-30.
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A study of 577 children referred for chromosome analysisGreenlaw, Ann. January 1982 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1982. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 77-81).
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Genetic and molecular analysis of mitotic chromosome condensation in DrosophilaAxton, John Myles January 1990 (has links)
No description available.
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Chromosomal behaviour during meiosis in mossesDill, Frederick John January 1964 (has links)
The primary purpose of the present work was to examine meiosls in mosses, concentrating on the detail of prophase I, a meiotic stage which has been described in detail only in Pleurozium schreberi. Secondarily, an investigation was undertaken to study the effect of heat stress on meiosls.
Hypnum circinale Hook, and Brachythecium frigidum (C.M.) Besch. were used to study meiosis. The procedure of preparing spore mother cell squashes was similar to that used by Steere et al. (1954), with modifications in handling the plants prior to fixation to ensure against production of heat induced anomalies.
Except for late prophase I, meiosis in both species conformed to that found in P. schreberi. In H. circinale and B. frigidum diplotene was followed by chromosome elongation and resulted in a diffuse stage. This stage is morphologically analogous to the dictyotene stage of the growing oocytes of many animals, and appears to have been described, in plants, only in Balsamina hortensis. It is probable that the stage occurs in many moss families; at present its functional significance is unknown.
In the heat stress experiments, plants of H. circinale were either maintained under laboratory temperatures while being studied or they were treated with a heat shock over a period of four or six hours with the maximum temperature in the general ranges of 25°C., 31°C., and 36°C. The maximum temperature was maintained for 4 hours in the 25°C. experiment and 1/2 hour in the remaining experiments. The heating and cooling gradients were almost equivalent (1°C./5 min.), and the starting and finishing temperature was 14°C. The temperature of the natural environment during the study ranged between 7-ll°C
Severe anomalies, including chromosome clumping and multiple association, precocious disjunction, chromosome contraction, spindle breakdown and inhibition, premature meiotic induction and meiotic abortion were observed to some extent in spore mother cells from all treatments except the ones from the 25°C. heat shock experiment.
Room temperature accelerates prophase I stages of H. circinale. The time available for these stages appears to be too brief for synthesis of necessary products leading to active stages, thus causing severe abnormalities which result in abortion of meiosis.
On the basis of these results, it is apparent that cytologists working with moss material should take care in handling the plants prior to fixation to ensure against heat induced meiotic anomalies. / Science, Faculty of / Botany, Department of / Zoology, Department of / Graduate
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Variation in the relative lengths of chromosomes.Corey, Margaret Jean. January 1965 (has links)
No description available.
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Cytotaxonomical studies of some Schizophorous diptera.Jan, Kun Yan January 1966 (has links)
No description available.
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Differential reactivity in the chromosomes of Trillium species.Boothroyd, Eric Roger. January 1943 (has links)
No description available.
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