高中英语 Module 2 DNA the Secret of Life课件 外研选修9.ppt

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1、DNADNA-the Secret of Life-the Secret of Life2021/8/11 星期三12021/8/11 星期三2INTRODUCTIONINTRODUCTIONVocabulary and speakingMatch the word and phrases in the box with their meanings.2021/8/11 星期三3take after1.to have similar physical features as someone else2.to be similar to an older person in your famil

2、y in appearance or personality 3.a formal word meaning to have similar physical features as someone elselook likeresemble2021/8/11 星期三41.Who do you look like,your mother or your father?Explain how you resemble him/her.2.Who do you take after in your personality?Work in pairs and discuss the question

3、s.2021/8/11 星期三5Complete the sentences about the body with the words in the box.cell diseases environment gender genetics identical twin2021/8/11 星期三61.Something that is found in all living things is a _.2.A _ is one of two children born at the same time to the some mother.3._ is the study of genes.

4、4.Some _ are inherited but not all of them.celltwinGeneticsdiseases2021/8/11 星期三75.The _ of a child is whether it is a boy or a girl.6.Twins who are _ have exactly the same genes.7.The _ as well as our genes makes us who we are.genderidenticalenvironment2021/8/11 星期三8Work in pairsWork in pairsDiscus

5、s which characteristics you have inherited from your parents and which characteristics are formed by your environment.2021/8/11 星期三9Use the words in the box.eyesight eye color gene health height intelligence weight personality2021/8/11 星期三10Reading&Vocabulary 1Reading&Vocabulary 12021/8/11 星期三11Fast

6、 readingFast readingRead parts 1 and 2 of the passage and answer the questions.2021/8/11 星期三12Part1Why did Watson and Crick say,“We have discovered the secret of life?”Becausetheyhadfoundtheanswertooneofthemostimportantquestionsofbiology-howdolivingthingsreproducethemselves?Why did the discovery of

7、DNA is very important?The discovery of DNA has been called the most biological work of the last 100 years.It has already had and will continue to have an enormous influence on our lives.We have already experienced the benefits in many years.2021/8/11 星期三13Story ADNA testing was made a standard proce

8、dure in criminal investigations.whats each story about?whats each story about?2021/8/11 星期三14Story BUsing a technology called genetic engineering,a couple had a highly intelligent,good looking baby.2021/8/11 星期三15Story CHaving been inserted an animal gene,Mark won all his races.2021/8/11 星期三16Story

9、DHaving been tested that the unborn child would have a terrible,inherited illness,the couple decided to get rid of it.2021/8/11 星期三17Part 3 Do you think stories AD in part 2 are true?StoriesAandDhaveactuallyhappenedmanytimes.StoriesBandCwillbecomepossibleinthenearfuture.What will genetic engineering

10、 help scientists to do in the near future?Thenewtechnologyofgeneticengineeringmeansthatscientistswillsoonbeabletoinsertnewgenesintounbornbabies,childrenoradults.2021/8/11 星期三18What will happen if we start choosing the characteristics of our babies?Wearealteringnatureinaverydirectway.What might the c

11、onsequences be?Itispossiblethatwewillcreatetwokindsofpeople,geneticallyengineeredpeopleandordinarypeople.2021/8/11 星期三19commitamurdercouplehereditaryperformanoperationpregnantquestionreproducevictim1.howdolivingthingsreproducethemselves?Thismeans_.(a)tohavebabiesorproduceyoungplants(b)tofeedthemselv

12、es.2.ourgenes,whichpasshereditarycharacteristicsontoourchildren.Thismeans_.(a)new(b)inheritedfromparents.(a)(b)2021/8/11 星期三20commitamurdercouplehereditaryperformanoperationpregnantquestionreproducevictim3AlthoughthepolicequestionedhimThismeans_.(a)towonderaboutsomeone(b)toasksomeonequestions4Butwhe

13、nhecommittedthemurderThismeans_.(a)killedtheman(b)sawthedeadman.5.watersleftsomeofhisowncellsonhisvictim.Thismeans_.(a)thepersonheattacked(b)hisownclothes(b)(a)(a)2021/8/11 星期三21commitamurdercouplehereditaryperformanoperationpregnantquestionreproducevictim6Aboutsixmonthsago,Marksecretlyvisitedasurge

14、on,whoperformedanoperationonhim.Thismeans_(a)Markhadanoperation(b)thesurgeonsaidMarkshouldhaveanoperation7.DamianPetersonandhiswifeClaraareanothercoupleThismeans_.(a)twopeoplewhoaremarried(b)example8.WhenClarabecamepregnantThismeans_(a)becameworried(b)wasgoingtohaveababy.(a)(a)(b)2021/8/11 星期三22Disc

15、ussion:Whatisyouropinionaboutthedevelopmentsingeneticsingeneral?EXAMPLE:Ithinktheyreveryexciting,butweneedtobeverycareful.Wedontknowwhatconsequencesofthesechangeswillbe2021/8/11 星期三23Read through the words in the box,and pay attention to the stress.advance alter athlete benefit consequence developme

16、nt field good-looking insert structure technology2021/8/11 星期三24Answer the questions about the words above.1.What is another word for 2.A.athlete B.consequence C.alter D.field E.good-lookingrunnerresultchangeareahandsome/pretty2021/8/11 星期三252.Does a plant have a structure?Yes,it does.3.What are the

17、 benefits of learning English?International communication.2021/8/11 星期三264.Can you think of a technology that is used in business?Computer technology.5.Which two words in the box can have more or less the same meaning?advance,development2021/8/11 星期三27Reading&Vocabulary 2Reading&Vocabulary 22021/8/1

18、1 星期三28Your Genes,Your Future2021/8/11 星期三29Read the passage and complete the sentences.1.Scientists will soon have the ability to _.2.However,scientists will not be able to _3._.“read”our genespredict our future with any realsuccess2021/8/11 星期三30Read the passage again and answer the questions.1.Wh

19、ich characteristics,physical or psychological,are inherited or mostly inherited?Physical.2021/8/11 星期三312.Does it seem that most psychological traits are inherited?Give examples in your answer.It is a mixture of inherited and environmental factors that affect traits like violence or getting on well

20、with people.2021/8/11 星期三323.Why wont scientists be able to tell us a lot about our future?Because of the unpredictable nature of environmental factors.2021/8/11 星期三334.What do“these new developments”refer to in the last paragraph?The ability to read our genes.2021/8/11 星期三345.What kind of problems

21、will these new developments create?They many mean that people will be prejudged on factors which would not actually occur,simply because of what their genes predict may happen.2021/8/11 星期三35Find these words in the passage and match the words with their plicated decade in detail envelope to a(great)

22、extent insurance company physical psychological2021/8/11 星期三361.a period of ten years2.connected with your body rather than your mind3.c paper cover that you put a letter in before you send it 4.a particular characteristic in someones personality5.mainlydecadephysicalenvelopetraitto a great extent20

23、21/8/11 星期三376.connected with your mind and feelings7.giving smaller facts 8.a company that will pay you money if you are ill,when you pay money every month10.using physical force to hurt people or damage propertypsychologicalin detailinsurance companyviolence2021/8/11 星期三38Explain the meaning of th

24、e words and phrases.2021/8/11 星期三391.As long as you have a good diet,scientists can predict your height by looking at your parents heights.If you have a good diet,it means that you are eating healthily.Healthy eating means the right balance between different types of food.2021/8/11 星期三402.We now kno

25、w that the need to wear glasses has a genetic cause.The need to wear glasses is caused by various eye problems.People who are short-sighted are only able to read things which are close to them,while people who are long-sighted cannot see things clearly when they are near.Both long-and short-sightedn

26、ess can be corrected by wearing glasses.2021/8/11 星期三413.Our eating habits also appear to be decided by our genes!Eating habits are the tendency to prefer certain kinds of food.Some people are said to have a“sweet booth”because they like lots of cakes,sweets and chocolates.Other people naturally don

27、t like meat and so on.2021/8/11 星期三424.Do you enjoy dangerous sports such as car racing?Car racing is the competition between high-performance cars,usually around a track.The Formula One circuit is perhaps the best known of these but there are also other kinds of race,such as rallies.2021/8/11 星期三43

28、5.This is true of things such as how violent we are,and how well we get on with other people.How well we get on with other people is to do with our temperament.Some people like the company of others while other people prefer to be alone.Some people are happy to share,while others are selfish.These c

29、haracteristics will affect how well we get on with other people.2021/8/11 星期三446.the fact is that scientists will be able to“read”our genes in the near future.Literally the verb“read”means to look at marks on paper and understand what they mean.The word is also applied in other contexts,such as to“r

30、ead”your mind-to try to understand what someone is thinking.In this genetic context,it means to understand what a person is like by looking at the make-up of their genes.2021/8/11 星期三45Read DNA-the Secret of Life on Page 16 again.Compare it with Your Genes,Your Future on page 22.2021/8/11 星期三461.Whi

31、ch passage do you find more exciting?2.Do either of the passages worry you?Why?/Why not?2021/8/11 星期三473.Which passage gives examples from real life?Would you prefer examples from real life in the other passage?2021/8/11 星期三484.Which passage gives more scientific information?Would you prefer to have

32、 more scientific information?5.Which passage do you think you will remember for longer?2021/8/11 星期三49Reading PracticeReading Practice2021/8/11 星期三50GM FoodGM Food-Good or Bad?-Good or Bad?2021/8/11 星期三511.What is genetically modified food?2.How can you tell the difference between ordinary food and

33、GM food?3.How much GM food is there in China?4.What are the advantages of GM food?5.What are the disadvantages?6.What should we do about GM food in China?2021/8/11 星期三52Is GM food good or bad?Not much is known about long-term effects of GM food on humans and the environment.It is“unpredictable”.2021

34、/8/11 星期三53Answer the questions.1.Is transgenic food the same as genetically modified food?Yes.2021/8/11 星期三542.What is the risk of producing a GM crop which kills pests?It will kill good insects as well.2021/8/11 星期三553.Why is the risk from carcinogens reduced in GM food?Because there are fewer tra

35、ces of cancer inducing pesticides in the food.2021/8/11 星期三564.What is the risk to someone who is allergic to a particular gene?If that gene is transferred to another food,and the allergic person doesnt know.2021/8/11 星期三575.How does the amount of GM food in the US compare with the number of people

36、who think its dangerous?30 of maize,50 of Soya beans,50 of potatoes and tomatoes are GM,and 27 of consumers are worried about the dangers of GM.2021/8/11 星期三586.How could GM food be stopped from entering China?By having the customs inspect all imported foods.2021/8/11 星期三597.How did the writer know

37、that there werent any imported GM foods in the markets?They did a big survey.2021/8/11 星期三608.What action is going to be taken about GM foods in China?Foods are going to be labeled.2021/8/11 星期三61Look at these pairs of sentences from the passage.Decide if the second sentence adds to or contrasts wit

38、h the information in the first sentences.2021/8/11 星期三62(a)GM food is already common in the United States.(b)China does not produce very much GM food(b)contrasts with(a)2021/8/11 星期三63(a)In Canada and the United States,27 percent of consumers fear that GM food could be dangerous.(b)In Europe,a major

39、ity of consumers are in favor of banning them,and 79 percent of the UK public opposes GM food.(b)adds to(a)2021/8/11 星期三64(a)Chinese customs do not list transgenic products as an item requiring inspection.(b)Therefore GM products may enter the country from abroad.(b)adds to(a)2021/8/11 星期三65(a)Neith

40、er young nor old people feared possible side effects from GM foods.(b)some parents of children said that they would now pay more attention to food labeling.(b)contrasts with(a)2021/8/11 星期三66Answer the questionsAnswer the questions2021/8/11 星期三671.Scientists have found that a crop with agene that ki

41、lls pests can leave a poison in the soil that kills helpful as well as harmful insects.(a)What can the crop do?leave a poison in the soil.2021/8/11 星期三68(b)What does the crop contain?(c)What can the poison in the soil do?a gene that kills pestskills helpful as well as harmful insects2021/8/11 星期三692

42、.Yet reducing the amount of insecticides needed by using GM crops can reduce the amount of cancer producing chemicals-or carcinogens-that are found in food.(a)How can you reduce the amount of insecticides needed?by using GM crops2021/8/11 星期三70(b)What needs insecticides?the crops(c)What can reduce c

43、ancer producing chemicals?using less insecticides2021/8/11 星期三713.If a gene that produces an allergic reaction is transferred into another crop,then a person who usually avoids food containing this gene may not know that it is now present in the modified food.(a)What kind of gene is it?one which cau

44、ses an allergic reaction2021/8/11 星期三72(b)What kind of person is it?(c)What might this person not know?a person who usually avoids those foodsthat the GM food has that gene in it2021/8/11 星期三73(b)What do they not apply to?imported agricultural products(c)Why is this unfortunate?Because GM food will be imported unchecked.2021/8/11 星期三74Thankyou2021/8/11 星期三752021/8/11 星期三76