冀教版九年級(jí)下unit2 dna lesson 11課件(共27張ppt)

1、Lesson 11 Cloning People?,What things about you show your parents’ DNA? With a partner, talk about things that are the same between you and your parents. You can start like this:Mom is tall. So am I.Dad’s eyes are

2、not very big. Neither are mine.,Lead in:,What is DNA?What are identical twins?What do you know about DNA?Do you know Dolly, the first cloned sheep?What if scientists could make clones of human beings?,the “blueprint

3、of life”,Each clone would have the same DNA. But would they be exactly the same as the original human? Or would they be different?,Scientists clone dinosaurs,Is it possible for scientists to clone people?,clone v. ＆n.

4、 克隆human being 人exactly adv. 精確地original adj. 原始的divide v. 分開(kāi)egg n. 卵細(xì)胞；卵子,adult adj. 成年的Dolly 多利（克隆羊的名字）design v. 設(shè)計(jì)insect n. 昆蟲(chóng)damage v. 損害,New words,Presentation:,Listening TaskThe clon

5、es are the ______ height.There are ______ ways to clone people.,same,two,Can we make clones from dead DNA?What are the two ways to clone people?Would cloning humans be a good or bad thing?,Read carefully and answe

6、r the following questions:,We can divide a growing egg in half. Then we would have two eggs with the same DNA. Or we could clone an adult person , the same way scientists cloned Dolly, the sheep.,1. What if scientis

7、ts could make clones of human beings?,what if … “要是……會(huì)怎么樣/怎么辦？” 后面是條件狀語(yǔ)從句,What if the plants are bad for humans? What if you could combine other animals or plants to make some

8、thing new? I don’t like bungee jumping(蹦極) at all. What if the rope breaks? You must work hard now. What if you fail in the examination of June?,Language Points:,make clones of sb./sth.clone sb./sth.,clo

9、ne n. & v. “克隆”,human = human being 指與動(dòng)物區(qū)分的人或人類 a human humans (pl.) human being human beings (pl.),man 作“人類”解時(shí)，常用單數(shù)形式，也可用復(fù)數(shù)形式，且前面無(wú)限定詞，單數(shù)處理,

10、They are not the bones of an animal, but human being’s.Man/Mankind is fighting a battle against pollution.Man/Mankind is much cleverer than it was a thousand years ago.All progressive __________ love peace.,mankind,2.

11、 But would they be exactly the same as the original human?,exact adj. 精確的 exactly adv. “恰?。痪_地”,The plane arrived at exactly 10 o’clock.Tell me exactly where Mary lives.It is exactly eight o’clock, not o

12、ne minute more or one minute less.,3. In some ways, clones would be exactly the same.,in some ways “在某些方面”,在某些方面他們看上去一樣。 從某些方面看你是對(duì)的。,In some ways, they look the same.,In some ways, you are right.,4. Because w

13、e are more than our DNA.,more than + 名詞 “多于……;非但……尤其是” more than + 數(shù)詞 = over +數(shù)詞 “以上；多于”,He is more than a teacher. He is a doctor, too. There are more than/over fifty students in the classroom.,5. Many

14、 things change us: the places we live, the food we eat and the people we know.,6. We can divide a growing egg in half.,Please divide the apple in half/into halves. Let’s divide ourselves into several groups.,divide

15、 v. “分開(kāi)，分割” 常與in或into連用,7. Or we could clone an adult person, the same way scientists cloned Dolly, the sheep.,9. They can design new plants by combining the DNA of other plants.,take … from … “從……提取

16、……” put … into … “把……放入……”,8. Scientists can take DNA from one kind of animal and put it into another kind of animal.,design v. “設(shè)計(jì)；計(jì)劃” designer n. “設(shè)計(jì)者”,Who _______ can play the guitar?

17、Where _______ did you go?Do you have anything ________ to say?The ________ boys are playing football.What’s that in your the _________ hand?,else,else,else,other,other,else修飾不定代詞、疑問(wèn)代詞或疑問(wèn)副詞，必須位于這些詞后面。other修飾名詞，位于名詞的前面。

18、,10. What else have scientists designed by changing DNA?,11.It may let scientists find new ways to help sick people. 這也許能幫助科學(xué)家們找到幫助病人的新方法。 sick和ill都是形容詞，表示“生病的”，但二者有區(qū)別： ill只可用作表語(yǔ)；而sick既可作表語(yǔ)，也可作定語(yǔ)。

19、 He is ill/sick in hospital. 他生病住院了。 He is a sick boy. （正） He is an ill boy. （誤） 這個(gè)男孩生病了。,12.I think it would be fun to have a twin, but I don’t think I would want to be cloned! 我認(rèn)為有個(gè)雙胞胎會(huì)很有趣，但是我認(rèn)為我不想被克

20、?。‘?dāng)think, believe, expect, suppose, imagine等表示看法、意見(jiàn)的動(dòng)詞后接含not的賓語(yǔ)從句時(shí)且主句主語(yǔ)為第一人稱，習(xí)慣上把not移到主句之中，構(gòu)成否定轉(zhuǎn)移。例如：I don’t think that she is interested in maths. 我認(rèn)為她對(duì)數(shù)學(xué)沒(méi)有興趣。,13.What kind of DNA are they wearing? 他們帶有哪種DNA?【辨析】we

21、ar, put on與dresswear表示“穿，穿著；戴，戴著”，強(qiáng)調(diào)狀態(tài)。put on表示“穿上，戴上”，強(qiáng)調(diào)動(dòng)作。dress表示“穿衣”，其賓語(yǔ)是表示人的名詞，而不是表示衣服的名詞。He always wears a hat. 他總是戴著一頂帽子。Put on your glasses if you can’t see clearly. 如果你看不清的話，就戴上眼鏡。,What if it __________(rai

22、n) tomorrow?Other people think human _________(clone) is okay.Everyone except Jim and John _______ (be) there when the meeting began.Li Lei, together with us ___ (be) playing now.His uncle has been _________(die) for

23、 many years.,Ⅰ.Fill in each blank with the proper word from the brackets:,rains,cloning,was,dead,is,Practice:,6.Li Lei is always __________(worry) about his studies.7.What he said makes me __________(worry).8.Who is th

24、e _________(design) of our new school building?9.The boy can _______(exact) learn these numbers by heart.10. Li Yuchun is 1.74 metres in ________(high).,worried,worried,designer,exactly,height,Ⅱ. 同義句轉(zhuǎn)換，每空一詞：1. What el

25、se have scientists designed by changing DNA? What _______ _______ have scientists designed by changing DNA?2. The computers are made in China. They sell well. The computers _________ ____ _____ in China sell w

26、ell. The computers ________ in China sell well.,other things,which/that are made,made,3. We can only make clones from living DNA. We can only make clones ______ ______ living DNA.4. It may let scientists

27、 find new ways to help people who are ill. It may let scientists find new ways to help _____ _______.5. You can divide the apple in half. You can divide the apple ____ _____ _______.,out of,sick people

28、,into two halves,根據(jù)漢語(yǔ)意思完成句子，每空一詞：在某些方面，我們可以幫助別人。 ____ ______ _______, we can help other people.2. 許多衣服是棉布做的。 Many clothes _______ _______ _______ cotton.3. 我們可以培植對(duì)昆蟲(chóng)有害處的植物。 We can make plants that ____

29、__ _____ _____ insects.,In some ways,are made of,are bad for,4. 科學(xué)家們能從一種動(dòng)物中提出DNA，并把它放入另一種動(dòng)物。 Scientists can _________ DNA __________ one kind of animal and _______ it _______ another kind

30、 of animal.5. 通過(guò)DNA，科學(xué)家能鑒別你和與你有關(guān)的人。 From your DNA, scientists can identify you and people _________ ____ you.,take from,put into,related to,HomeworkPlan a debate about this topic: i