Module 5, Unit 3 Welcome to the unit

clone The advanced technique in genetics(遗传学) with which scientists can create or copy things with the same DNA is called -? clone

Scientific definition Cloning is the creation of cells or whole animals by using DNA(脱氧核糖核酸) from 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

cloned female pigs

cloned calves from Japan

the first cloned monkey.

cloned chicken

the cloned deer

Do you think the cloned animals are as healthy as the natural ones? Dolly is, 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).

Brainstorming If you are a scientist, what doyou want to clone?Why?

More contributions to human

More world champions

China, a more harmonious community

Supposing you are facing your second self who looks Just imagine Supposing you are facing your second self who looks like you, talks like you and thinks like you, how do you feel?

Try to describe Bush’s feelings.

Fun pictures If cloning goes wrong, what will happen?

A dog or an eagle?

A duck or a crocodile?

A cock or a dog?

A lion or a kangaroo?

A frog or a crocodile?

A tortoise or a bear?

A bird or a dog?

A dog or a man?

Discussion Do you think governments should pass laws to prohibit human cloning? Why or why not?

Party A They shouldn’t, for… reasons: Cloning can help cure many diseases and save a lot of people lives. 2. …… 3. …… reasons:

Party B They should, for… reasons: Cloning can lead to ethical(伦理) problems. 2. …… 3. …… reasons:

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 opinion, …

Thank you for your attention!

Bye Bye