写一篇有关克隆的英语作文
You can read the word cloning quite often in the newspaper. I find it very interesting. It seems like a fairy story.With cloning you will be copied. Today, scientists can clone some large animals. Doctors are in the process of cloning humans though it is not allowed in most of the countries.
Cloning brings a lot of questions. If someone can come to the world with only one parent, will he or she be happy? My grandmother died a few years ago. I miss her very much. If she can be cloned into a new one, I'll be very happy but confused.What shall I call her after she comes into the world? Becauseshe -- my grandmother is younger than I.
求一篇有关克隆的英语作文
Society
Increased food security for growing populations
If the low success rates can be improved (Dolly was only one success out of 276 tries), reproductive cloning can be used to develop efficient ways to reliably reproduce animals with special qualities. For example, drug-producing animals or animals that have been genetically altered to serve as models for studying human disease could be mass-produced.
Reproductive cloning also could be used to repopulate endangered animals or animals that are difficult to breed. In 2001, the first clone of an endangered wild animal was born, a wild ox called a gaur. The young gaur died from an infection about 48 hours after its birth. In 2001, scientists in Italy reported the successful cloning of a healthy baby mouflon, an endangered wild sheep. The cloned mouflon is living at a wildlife center in Sardinia. Other endangered species that are potential candidates for cloning include the African bongo antelope, the Sumatran tiger, and the giant panda. Cloning extinct animals presents a much greater challenge to scientists because the egg and the surrogate needed to create the cloned embryo would be of a species different from the clone.
Therapeutic cloning technology may some day be used in humans to produce whole organs from single cells or to produce healthy cells that can replace damaged cells in degenerative diseases such as Alzheimer's or Parkinson's. Much work still needs to be done before therapeutic cloning can become a realistic option for the treatment of disorders.
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