关于克隆人的英文文章,,急!!!!!

来源:百度知道 编辑:UC知道 时间:2024/05/14 03:25:39
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关于克隆人的,需要正反方面英文文章两篇
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What is Cloning - Is it Right or Wrong?
Srabonti Narmeen Ali
On July 5, 1996, a sheep named Dolly was born in the Roslin Institute in Edinburgh, Scotland. Dolly was the first clone of a mammal from an adult cell. Dolly was not, however the world's first attempt at cloning, which began at the beginning of the century. (10) The birth of Dolly also introduced the birth of the possibility of another idea: the cloning of human beings This gave rise to controversy and the question of whether cloning humans was morally right.
There are two different methods or ways to clone. One way is known as embryo cloning, which is also known as 'artificial twinning' because it resembles the process in which twins develop. "Human embryo cloning starts with a standard in vitro fertilization procedure. Sperm and an egg cell are mixed together on a glass dish. After conception, the zygote (fertilized egg) is allowed to develop into a blastula (a hollow mass of cells). Th