新人教版选修八-Unit-2-Cloning-Reading课件

cloning

Reading

Naturalclone

isonethatoccurs

inanaturalformofcloning

withouthumanhelp.Man-madeclone

isonethat

producedthroughhuman

intervention(介入).Inpairs,lookatthesepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman-made.Explainhowtheydiffer.DiscussionAstrawberryplantNaturalcloneGrowingnewplantsman-madecloneTwinsNaturalcloneDollythesheepShewascloned

while

theotherswerebornnaturally.Dollywasa______sheep.clonedHowdoesDollydifferfromothersheep?man-madecloneReading

Listentothetapeandfindoutthemainideaofeachparagraph.Cloningisawayofmakinganexactcopyofanotheranimalandplant.Whatiscloning?Ithappensbothin______andin_______.Theycanbeclonedby________and_______.plantsanimalsthemselveshumansNaturalcloneMan-madeclonePara1

Thedefinitionofcloning1.Howmanymajorusesdocloninghave?

Firstly,…commercial…Secondly,…research…2.WhenwasthecloningofDollythesheepborn?Para21996ThemajorusesandproceduresofcloningAtfirst,thefactthatDollydeveloped______inanaturalwaywas__________.Later,thenews_____shelivedforsixyears,halfthelengthofthelifeofthe______onewas__________.Finally,theproblemthatoccurredtothescientistswasthataclonedanimallives

_____________theoriginalone.Para3TheproblemsofDollynormallyencouragingorginalthataslongas/shorterthan/longerthandisturbingshorterthanTheword“controversial”inpara4probablymeans____________.A.complicatedB.arguableC.importantPara4TheimpactofDollyTrueorfalse:1PeoplefearedthatClonedHitlerswoulddoharmtotheworld.2Alltheresearchintohumanbeingswillbeforbidden.3Somecountrieswillusecloninginawiseway.Para5People’sreactiontocloningManygovernmentsforbadereserchintohumanbeings.theauthordoesnotstateany

personalopinionaboutcloning.A.Objective(befair)

B.Negative(beagainstit)C.Positive(beinfavorofit)Thewriter’sattitudetowardscloningBecause_________________________________________________________________IntensiveReadingFillinthechartonPage

12usingtheinformationfromthetext.Whichiseasiertoclone,plantoranimal?

Becausecloningplantsisstraightforward,butthecloningofanimalsisverycomplicated.Discussion

Homework1.

TranslatetheprocedureofcloningDollythesheepintoChinese.2.

FinishEx.1,2,3,Page12.1996cloningsheeps2001cloningcattle我国成功繁殖克隆兔

体形要比普通兔大许多2002年5月中旬成功地繁殖了一只胚胎细胞克隆兔。2002cloningcats第一只克隆宠物猫克隆马及其“母亲兼姐姐”2002年4月十六日美国第一头克隆牛“艾米”产下牛犊喜作妈咪2005cloningdogs克隆的荧光小猪(左)和正常小猪(右)AstrawberryplantThenewplantsthatgrowfromtherunnersareexactcopiesoftheoriginalplant.

一株草莓依靠它沿地“爬走”的匍匐茎,一年内就能长出数百株草