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Extra Chromosome Genetic Material
1,960 wordsIn 1942, Dr. Harry Klinefelter and his coworkers at the Massachusetts General Hospital in Boston published a report about nine men who had enlarged breasts, sparse facial and body hair, small testes, and an inability to produce sperm. By the late 1950 s, researchers discovered that men with Klinefelter syndrome, as this group of symptoms came to be called, had an extra sex chromosome, XXY instead of the usual male arrangement, XY. In the early 1970 s, researchers around the world sought to ident...
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Factor Ix Clotting Factor
1,179 wordsIntroduction Hemophilia is a rare genetic blood clotting disorder that primarily affects males. People living with hemophilia do not have enough of, or are missing, one of the blood clotting proteins naturally found in blood. Two of the most common forms of hemophilia are A and B. In persons with hemophilia A (also called classic hemophilia), clotting factor VIII is not present in sufficient amounts or is absent. In persons with hemophilia B (also called Christmas disease), clotting factor IX is...
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Fertilized Egg Y Chromosome
358 wordsSex Chromosomes Chromosomes are the aggregates of genes, carrying heredity information. They comprise of proteins and DNA, and are located within the cells' nucleus. Human cells contain 22 pairs autosomes and only one pair of sex chromosomes. These sex chromosomes, the X and the Y chromosomes determine the sex of the individual, or the gender. In such a way, there are two sex chromosomes in a human somatic cell: XX in female and XY in male. A human germ cell contains only one sex chromosome, whi...
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Human Genome Project British Medical Association
3,429 wordsGenetics: Issues of IVF, screening, pre-selection, genetic testing, cloning and the social implications. James Watson once said, We used to think that our fate was in our stars. Now we know that, in large measure, our fate is in our Genes (Jaroff 1998). On June 26 th 2000, The Human Genome Project will unveil its rough draft mapping of the deoxyribonucleic acid (DNA) sequences within the human chromosomes (genetic code), to the public. The project has been ongoing since the late eighties, and is...
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X And Y Vitro Fertilization
1,447 wordsSex Preselection For many years, mankind has wondered how to choose the sex of a child before its birth for which countless myths, folk remedies, and magic potions have been offered as a solution. None of these methods were based on scientific evidence. However, in recent years gender selection has been made possible through advances such as preimplantation genetic diagnosis using biopsy methods combined with in vitro fertilization and sperm separation using flow cytometry techniques (Reubinoff,...
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X And Y Vitro Fertilization
1,469 wordsSex Preselection For many years, mankind has wondered how to choose the sex of a child before its birth for which countless myths, folk remedies, and magic potions have been offered as a solution. None of these methods were based on scientific evidence. However, in recent years gender selection has been made possible through advances such as preimplantation genetic diagnosis using biopsy methods combined with in vitro fertilization and sperm separation using flow cytometry techniques (Reubinoff,...
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Mental Retardation Extra Chromosome
1,780 wordsTHEKlinefelter Syndrome KLINEFELTER SYNDROME THE XXY BOY IN THE CLASSROOM Although there are exceptions, XXY boys are usually well behaved in the classroom. Most are shy, quiet, and eager to please the teacher. But when faced with material they find difficult, they tend to withdraw into quiet daydreaming. Teachers sometimes fail to realize they have a language problem, and dismiss them as lazy, saying they could do the work if they would only try. Many become so quiet that teachers forget theyre...
Free research essays on topics related to: y chromosome, genetic material, extra chromosome, x chromosome, mental retardation
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