1 Three Waves of Variation Study: The emergence of meaning in the study of variation Penelope Eckert Stanford University Abstract The treatment of social meaning in variation has come in three waves of analytic practice. The first wave of variation studies established broad correlations between linguistic variables and the macro-sociological categories of socioeconomic class‚ sex class‚ ethnicity and age. The second wave employed ethnographic methods to explore the local categories and configurations
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A controversial issue of the twenty-first century is the possible application of new techniques in genetic engineering to produce human clones. Up until now genetic engineering and cloning has been used to clone plants‚ unicellular organisms‚ amphibians and simple mammals. This has led to significant advances in agriculture‚ industry‚ and medicine. Newer techniques in genetic engineering have enabled scientists to clone more complex mammals and opened up the possibility of cloning humans. Although
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Genetic Engineering – A Curse or a Blessing? What is geneitc engineering? Many struggle to understand the real meaning and outcrops of this complicated‚ highly expensinve procedure. Genetic Engineering is a direct human manipulation of an organism’s DNA structure. As intricated as it seems‚ it’s a technology that has been used for decades‚ and is soon to outbreak into a real “Cloning Aeon”. Therefore‚ how could we know the benefits and the drawbacks of this technique? Let us take a hinge
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AmirAshkan Semyary By using the techniques of genetic engineering scientists are able to modify genetic materials so that a particular gene of interest from one cell can be incorporated into a different cell. It is necessary to obtain a gene to modify genetic material. First a scientist isolates plasmid DNA from bacteria and DNA carrying a gene of interest from cells of another organism‚ such as an animal. A piece of DNA containing the gene is inserted into a plasmid‚ producing recombinant DNA
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Mendelian Genetics Introduction In 1865 an Austrian monk‚ Gregor Mendel‚ presented the results of painstaking experiments on the inheritance of the garden pea. Those results were heard‚ but not understood‚ by Mendel’s audience. In 1866‚ Mendel published his results in an obscure German journal. The result of this was that Mendel’s work was ignored and forgotten. Mendel died in 1884 without knowing the pivotal role his work would play in founding the modern discipline of genetics. By 1899‚ some
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disease is first attributed to genetic causes ("inborn errors of metabolism"). (Sir Archibald Garrod‚ alkaptonuria) 1902 The chromosome theory of heredity is proposed by Sutton. Boveri recognizes that individual chromosomes are different from one another‚ but he doesn’t make a connection to Mendelian principles. Nevertheless‚ Boveri is given co-credit by friend E.B. Wilson (Sutton’s supervisor) for proposing the chromosome theory of inheritance. 1905 The word "genetics" is coined by William Bateson
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Sir Edward William Elgar was born June 2nd‚ 1857 in Lower Broadheath‚ England‚ and died February 23rd 1934 in Worcester. His Enigma Variations‚ in which 14 variations on a theme depict the lives and personalities of some of Elgar’s closest friends and colleagues‚ was composed between October 1898 and February 1899. The piece was premiered June 19th‚ 1899 at St. James’s Hall‚ with Hans Richter conducting‚ and was immediately popular. This would begin a period of about twenty years in which Elgar composed
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1. Genetic cloning is one way of studying the specific proteins involved in cell division. A gene contains the instructions for how to make a protein. By mutating a gene‚ the protein’s shape‚ size and function could all be affected. Mutating a gene changes its instructions. Once a mutated gene is created and incorporated into a cell’s DNA‚ the cell replicates‚ creating many cells containing the mutant gene. The cells with the changed gene can then be compared to normal cells. For starters‚ you must
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Mendelian Genetics * Pea plants have several advantages for genetics. * Pea plants are available in many varieties with distinct heritable features (characters) with different variants (traits). * Another advantage of peas is that Mendel had strict control over which plants mated with which. * Each pea plant has male (stamens) and female (carpal) sexual organs. * In nature‚ pea plants typically self-fertilize‚ fertilizing ova with their own sperm.
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Genetic Engineering‚ Solving World Problems XXXXXXXXXXXXXXXXXXXX Research Paper for ENGL 135 Professor Krivokuca DeVry University April 24‚ 2013 Genetic Engineering‚ Solving World Problems Can you imagine a four year old girl; her name is Elli‚ being awakened from the sounds and pains of her grumbling stomach? Her cries are answered as her mother comes in‚ picks her up and tries to sooth and comfort her. However‚ what this four year old girl needs‚ her mother cannot provide—food. It has
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