英语必修Ⅴ牛津译林版UNIT3精品课件（共22张）WELCOME.ppt

1、Welcome to the unitThe advanced technique in genetics(遗传学)with which scientists can create or copy things with the same DNA is called-?cloneCloning 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 s

2、ame DNA to the“parent”.Scientific definitionDolly and its creatorcloned female pigscloned calves from Japanthe first cloned monkeycloned chickenthe cloned deerDo 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)o

3、r 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 wantto clone?Why?BrainstormingMore contributions to humanMore world championsChina,a more harmonious communityJust imagineSupposing you are faci

4、ng your second self who looks like you,talks like you and thinks like you,how do you feel?Try to describe Bushs feelings.If cloning goes wrong,what will happen?Fun picturesA dog or a man?DiscussionDo you think governments should pass laws to prohibit human cloning?Why or why not?Part AThey shouldnt,forreasons:1.Cloning can help cure many diseases and save a lot of people lives.2.3.Part BThey should,forreasons:1.Cloning can lead to ethical(伦理)problems.2.3.1.Try to remember the information as possible as we learned.2.Preview the next part:Reading.