3. Electronic Theses and Dissertations (ETDs) - All submissions
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Item Possible effects of hormonal contraceptives on human and baboon mitosis chromosomes(1983-03) Pinto, Maximina RodriguesHormonal - contraceptives - ' the pill ' as it is known to the general public - are among the most universally used drugs in our contemporary world. Daily millions of health young women are taking the ' pill ' for a purpose other than the control of diseaseItem A study of the three most common chromosome trisomies,21 (Down Syndrome), 18 (Edwards Syndrome) and 13 (Patau Syndrome)(1997) Parrott, N,M.In 1959 Lejeune and his colleague first demonstrated a chromosome abnormality and showed that " infant mongoliens " had 47 instead of the normal 46 chromosomes in their body cells. Recent studies show that about 1 in 200 infants have recognisable chromosome abnormalities.Trisomy 21 ( Down syndrome, DS ) trisomy 18 ( Edwards syndrome, ES ) and trisomy 13 ( Patau syndrome, PS ) have been found to be the most common trisomies with population incidences of approximately 1 in 650, 1 in 8000 and 1 in 10000, respectivevely.Item Studies on the morphology and mapping of human chromosomes.(1978) Bobrow, M.The published works submitted in this thesis fall into three groups, covering different aspects of the study of the morphology and structure of human chromosomes. Session 1: Studies on chromosome banding and structural polymorphisms of human chromosomes. Session 2: Human gene mapping Session 3: MiscellaneousItem Chromosome studies in elephantulus with special reference to the allocyclic behaviour of the sex chromosomes and the structure of heterochtomatin(1947) Brenner, SydneyEvery organism, whether it he plant or animal, worm or man, propagates Itself with a definable degree of constancy* Such constancy cannot be entirely related to the ever-changing external environment; it becomes,of necessity, mainly an inherent function of the organism itself* Somewhere in the organism, there exists a system which determines, controls, or regulates the visible expressions of organlsmal constancy.