Welcome to the uni（M5U2）t云溪区一中 周灿辉.ppt

1、Unit 3 Science and nature,By Zhou Canhui Yunxi No.1 Middle School,Welcome to the unit,The advanced technique in genetics(遗传学) with which scientists can create or copy things with the same DNA is called ?,Scientific definition,Cloning is the creation of cells or whole animals by using DNA(脱氧核糖核酸) fro

2、m a single “parent”, bypassing (绕道而行) the normal reproductive (生殖) process. The clone has the same DNA to the “parent”.,Dolly and its creator,What do you know about Dolly?,the worlds first cloned mammal created by Scottish scientists in 1996 died in 2003 because of lung disease many countries have b

3、anned human cloning since Dollys birth,the cloned kitten,The kitten in the picture is called Cc. Its name is from “Copycat”. Scientists in the USA created it with a cell taken from its mother, Rainbow. It was born in December 2002.,the cloned female pigs,The five little pigs names are Noel, Angel, S

4、tar, Joy and Mary.,the first cloned monkey,The name of the cloned monkey is ANDi. It is from “inserted DNA” spelt backwards. It is the first genetically modified monkey. The technology is different from that used for Dolly.,Do you think the cloned animals are as healthy as the natural ones?,Dolly is

5、, but scientists do not yet know whether this is the exception (例外) or the rule. Some early evidences suggest that clones may have health problems and that they may age prematurely (早衰的，未老先衰).,If you are a scientist, what do you want to clone? Why?,Brainstorming,What do you think of the new kind of

6、technology? Does it have advantages or disadvantages?,Discussion,Do you think governments should pass laws to prohibit human cloning? Why or why not?,They shouldnt, for,reasons:,cloning can help cure many diseases and save a lot of people lives. 2. 3. ,Part A,They should, for,reasons:,cloning can lead to ethical(伦理) problems. 2. 3. ,Part B,Giving an oral report,Today our class had a discussion about whether the governments should pass laws to prohibit human cloning. Some students think that the governments should, for However, some other students think it necessary to prohibit, for In my