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Ethics of Human Cloning and Genetic Engineering Essay

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INTRODUCTION

When the Roslin Institute's first sheep cloning work was announced in March 1996 the papers were full of speculation about its long-term implications. Because of this discovery, the media’s attention has focused mainly on discussion of the possibility, of cloning humans. In doing so, it has missed the much more immediate impact of this work on how we use animals. It's not certain this would really lead to flocks of cloned lambs in the fields of rural America, or clinically reproducible cuts of meat on the supermarket shelves. But it does force us to ask questions about the way we are using animals with new technology, and the kinds of assumptions we make. To create Dolly (the cloned sheep), Scottish researchers simply took an unfertilized sheep egg and removed its genetic material. They then placed the empty egg in a dish with a cell from an adult sheep's udder, which contained a full complement of the adult sheep's genes. Finally the scientists applied an electric spark, which caused the two cells to fuse and begin dividing. The embryo was then transplanted into the womb of a surrogate mother to grow.
The original aim of Dr Wilmut's nuclear transfer work was to find better ways to make genetic modifications in animals, by growing live animals from cell culture. It is very possible that cloning was only a side effect of the investigation and not what was supposed to be the center of this research project. But the ability to clone opens up a range of questions of its own. We can already do it to a limited degree by splitting embryos, without ethical concerns. It has been practiced only to a very limited extent, mostly in cattle. At the moment there is only one set of results in one breed of sheep, and rather little is understood of how it has happened. Different farm animal species differ quite markedly in embryological interventions like artificial insemination and embryo transfer. So it remains to be seen whether this same method would work in any other animal, and without adverse effects. But assuming it could be applied more widely, what are the potential applications in animals? PPL (PPL Thearaputics Ltd, 1997) gives the example that it might be used, say, to clone 5-10 animals from a single genetically modified animal. These would be bred naturally, thus becoming the "founders" of a set of lines of genetically modified animals from who...


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... of other uses, far beyond making pharmaceuticals in sheep, and possibly of disturbing ethical implications.

Reference:

Aasen E. & Medrano J.F. (1990) Amplification of the ZFY and ZFX genes for sex identification in humans, cattle, sheep, and goats. Bio/Technology 8, pp. 1279-81.

Basker J.S.F., (1994) Animal breeding and conservation genetics. In: Conservation Genetics (ed. by V.Loeschcke, J. Tomiuk & S.K. Jain), pp. 381-95.

Bible, Old Testiment.

Campbell K.H.S, McWhir J., Ritchie W.A. and Wilmut I. (1996) Sheep Cloned by Nuclear Transfer From a Cultured Cell Line. Nature Vol. 380, pp. 64-66.

Klug W.S. and Cummings M. R. Essential of Genetics. Second edition. Prenctice Hall. Inc. 1996. pp. 492-508.

Morrison R. S., Meier D.E., Cassel C. K. (1996) When Too Much Leaves Too Little. New England Journal of Medicine: Clinical Problem Solving Volume 335, Number 23.

PPL Theraputic Ltd.- (1997) Animal Cloning News.(WWW) http://www.cabi.org/whatsnew/ cloneani.htm#2.

Uhl. J. Marketing of Food Products. Eighth Edition. Harp Inc. 1997 pp. 123-154.

Waalen J. (1997) Genetic Testing Opens Brave New World. Annals of Internal Medicine: Perspective Vol.29 pp22-4.


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