Cloning-definitions, pros, cons.

Essay by robzombieismyloverHigh School, 10th gradeB, January 2004

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The purpose of this paper is to discuss cloning. In this paper I will discuss the following: the three

types of cloning, reasons for cloning, reasons not to clone, cloning issues and the politics of cloning.

The definition of clone is one or more identical organisms descended asexually from a single

ancestor ,that makes it sound so simple.(1:132) Cloning isn't simple at all, it is actually a very complex

issue. To understand cloning you must first know how it works. First of all a nucleus containing an

individuals genetic code is removed from an egg cell. That nucleus is replaced with the nucleus from a

body cell (like a skin cell) from a donor. This combination of the two cells is then activated , most

commonly by an electric current. If all of this goes well an embryo begins to develop.

There are three types of scientific cloning. First there is embryo cloning which produces identical

twins or triplets.

This procedure is just the same as the natural way twins are produced, except that it's

planned. In the beginning one or more cells are extracted from a fertilized embryo, then the cells are

impelled to develop into more matching embryos. The result is a set of identical twins or triplets. Embryo

cloning has been done on several species of animals. There has only been restricted experiments conducted

on humans.

Adult cloning is another type of cloning. Also called reproductive cloning this procedure is used to

generate a duplicate of an already living animal. To do this one begins by removing DNA from an ovum.

This DNA is replaced by DNA removed from an adult animal's cell. Now the fertilized ovum, called a

pre-embryo , is placed into a womb. There it develops into a new baby animal. Reproductive cloning...