外研新標(biāo)準(zhǔn)選修九Module DNAthe Secret of Life 市賽一等獎(jiǎng)

Module2DNAthesecretoflifeOnFebruary28,1953,twoscientistsnamedJamesWatsonandFrancisCrickdiscoveredthesecretoflifeJamesWatsoninBritainandFrancisCrickinAmericaPart1WhydidWatsonandCricksay,“Wehavediscoveredthesecretoflife?”Becausetheyhadfoundtheanswertooneofthemostimportantquestionsofbiology---howdolivingthingsreproducethemselves?WhydidthediscoveryofDNAisveryimportant?ThediscoveryofDNAhasbeencalledthemostbiologicalworkofthelast100years.Ithasalreadyhadandwillcontinuetohaveanenormousinfluenceonourlives.Wehavealreadyexperiencedthebenefitsinmanyyears.Part2StoryAHowwasJohnWaterjudgedguilty?Heleftsomeofhisowncellsonhisvictim.ScientistscomparedtheDNAfromthesecellswiththeDNAfromthesecellswiththeDNAofpeopletheyhadquestioned.StoryBHowdidMikeandJuliahaveagood—Looking,veryintelligentchild?Juliahadasmallbutveryexpensiveoperation,usingatechnologycalledgeneticengineering.

StoryCHowdidMarkSawyerbecomeaworldchampionagain?HeletthesurgeoninsertananimalgeneintoMarkthatwouldmakehimrunfaster.StoryDWhathappenedtothecouple?Theirchildwillbebornwithaterrible,inheritedillness.Whatdidtheydecidetodo?Thecoupledecidedtogetridoftheunbornbaby.

Part3DoyouthinkstoriesA—Dinpart2aretrue?StoriesAandDhaveactuallyhappenedmanytimes. StoriesBandCwillbecomepossibleinthenearfuture.Whatwillgeneticengineeringhelpscientiststodointhenearfuture?Thenewtechnologyofgeneticengineeringmeansthatscientistswillsoonbeabletoinsertnewgenesintounbornbabies,childrenoradults.Whatwillhappenifwestartchoosingthecharacteristicsofourbabies?Wearealteringnatureinaverydirectway.

Whatmighttheconsequencesbe?Itispossiblethatwewillcreatetwokindsofpeople,geneticallyengineeredpeopleandordinarypeople.commitamurdercouplehereditaryperformanoperationpregnantquestionreproducevictim1.

…h(huán)owdolivingthingsreproducethemselves?Thismeans___________.(a)tohavebabiesorproduceyoungplants(b)tofeedthemselves.2.

…ourgenes,whichpasshereditarycharacteristicsontoourchildren.Thismeans___________.(a)new(b)inheritedfromparents.(a)(b)commitamurdercouplehereditaryperformanoperationpregnantquestionreproducevictim3Althoughthepolicequestionedhim…Thismeans___________.(a)towonderaboutsomeone(b)toasksomeonequestions4

Butwhenhecommittedthemurder…Thismeans___________.(a)killedtheman(b)sawthedeadman.5

.…watersleftsomeofhisowncellsonhisvictim.Thismeans___________.(a)thepersonheattacked(b)hisownclothes(b)(a)(a)commitamurdercouplehereditaryperformanoperationpregnantquestionreproducevictim6

Aboutsixmonthsago,Marksecretlyvisitedasurgeon,whoperformedanoperationonhim.Thismeans________(a)Markhadanoperation(b)thesurgeonsaidMarkshouldhaveanoperation7.

DamianPetersonandhiswifeClaraareanother

couple…Thismeans________.(a)twopeoplewhoaremarried(b)example8.

WhenClarabecamepregnant…Thismeans_________(a)becameworried(b)wasgoingtohaveababy.(a)(a)

(b)Discussion:

Whatisyouropinionabo