人教版選修八Unit2Reading

1、In pairs, look at these pictures and discuss which ones are natural clones and which ones are man-made. Think about how they differ.Dolly the sheepIts the most famous sheep in the world. Do you know how Dolly is different from other sheep?She was cloned while the others were born naturally. It is th

2、e copy of another sheep.What can you see in the picture?I can see a strawberry plant producing runners in a natural form of cloning.Who cut the stem off the plant?A gardener. The gardener is going to put it into a pot to produce another plant. He is actually making a copy of the plant.What do you kn

3、ow about twins?There are twins of the same sex and those of different sexes. The twins here are identical in sex and appearance and are good examples of natural clones. They carry the same genetic information. The fertilized egg has split into two while inside the mother, and so produced two identic

4、al human babies.Are the following clones the same? If not, what is the difference?No. The first two are man-made clones.The rest two are natural clones.Questions about cloning:1. What is a clone?A clone is an animal or plant produced naturally or artificially from the cells of another animal or plan

5、t and is exactly the same as it.2. How is a clone produced?The cloning of plants is simple and relatively easy. It can be done by taking cuttings (man-made cloning) or letting the plant produce its own runners (natural cloning). The cloning of animals is more complicated. It was not achieved until 1

6、996 and is fully explained in the first reading.3. What benefits can humans gain from cloning?1) Medical cloning can help cure serious illnesses that ruin ones quality of life (such as Parkinsons disease帕金森癥帕金森癥 or Alzheimers disease老年癡呆癥老年癡呆癥).2) It can help infertile people have babies.4. What pro

7、blems may arise when humans are cloned?1) People may want to clone themselves so they can live forever.2) People may want to clone dead children.3) People may want to clone their favorite pets.The text is mainly about the 1. _ of animal cloning and the life of Dolly the sheep, as well as the reasons

8、 why cloning is still 2. _.controversialprocedureRead the text quickly and complete its main idea.Read through the passage and find the main idea of each paragraph.Cloning is a way of making an exact copy of another animal and plant.Cloning has two major uses.The birth and death of Dolly.The effect

9、of Dolly.It is forbidden to clone human beings. Para 1. Para 2. Para 3. Para 4. Para 5. Read the text carefully and fill in the blanks.DefinitionCloning is a way of making _ of another animal and plant.Major uses of cloning Gardeners use it to _ commercial quantities of plants. It is valuable for re

10、search on new plant species and for _ research on animals.an exact copyproducemedicalAbout Dolly the sheep Encouraging news: Dolly seemed to develop _. Disturbing news: Dolly lived only six and a half years, half the length of the life of the _ sheep, because of serious illnesses which were more app

11、ropriate to a _.normallyoriginalmuch older animal Choose the best answer.1. As for the cloning procedure of Dolly the sheep, all of the following are true EXCEPT _.A. the lamb is the clone of the donated cell from sheep BB. electricity is neededC. female sheep B provides an egg cellD. three female s

12、heep are used C 2. From the last paragraph we know that _.A. cloning will come to an end because of objections B. cloned human beings will be produced in the near futureC. many countries will use cloning in a wise wayD. all the research into human cloning will be forbidden C A. Remove the cells nucl

13、eus. B. Wait until the egg cell with its new nucleus grows into an embryo.F Read the part of the text describing the procedure of cloning Dolly the sheep, and put the following events in the correct order according to the procedure.C. Remove the nucleus from a female sheeps egg cell.D. Put the embry

14、o into another female sheep.E. A cloned lamb is produced.F. Take a cell from the sheep you intend to clone.G. Put the cells nucleus into the female sheeps cell.CF A G B D ELook at these pictures, and discuss this question with your partner.Is cloning people a good thing or a bad thing?1.克隆技術(shù)現(xiàn)在還不成熟克隆

15、技術(shù)現(xiàn)在還不成熟, 克隆人克隆人可能有很多先天性生理缺陷。可能有很多先天性生理缺陷。2.克隆人的身份難以認(rèn)定克隆人的身份難以認(rèn)定, 他們與他們與被克隆者之間的關(guān)系無(wú)法納入現(xiàn)被克隆者之間的關(guān)系無(wú)法納入現(xiàn)有的倫理體系。有的倫理體系。3. 克隆技術(shù)有可能被濫用克隆技術(shù)有可能被濫用, 成為恐怖分成為恐怖分子的工具。子的工具。4. 從生物多樣性上來(lái)說(shuō)從生物多樣性上來(lái)說(shuō), 大量基因結(jié)構(gòu)大量基因結(jié)構(gòu)完全相同的克隆人完全相同的克隆人, 可能誘發(fā)新型疾可能誘發(fā)新型疾病的廣泛傳播病的廣泛傳播, 對(duì)人類的生存不利。對(duì)人類的生存不利。1. “不讓我們克隆人不讓我們克隆人, 就是不讓我們修正我們就是不讓我們修正我們的錯(cuò)

16、誤的錯(cuò)誤, 人類歷史難道能夠這樣構(gòu)造人類歷史難道能夠這樣構(gòu)造嗎？嗎？” 紐約時(shí)報(bào)書評(píng)紐約時(shí)報(bào)書評(píng)2. “當(dāng)然應(yīng)該當(dāng)然應(yīng)該克隆克隆人人, 如果誰(shuí)第一個(gè)掌握如果誰(shuí)第一個(gè)掌握了這個(gè)技術(shù)了這個(gè)技術(shù), 他就是我真正的、也是唯一他就是我真正的、也是唯一的競(jìng)爭(zhēng)對(duì)手。的競(jìng)爭(zhēng)對(duì)手?！?比爾比爾蓋茨蓋茨3. “克隆人絕對(duì)是科學(xué)上了不起的進(jìn)步克隆人絕對(duì)是科學(xué)上了不起的進(jìn)步, 克克隆技術(shù)必將創(chuàng)造隆技術(shù)必將創(chuàng)造21世紀(jì)的輝煌。世紀(jì)的輝煌?！?麻省理工學(xué)院教授麻省理工學(xué)院教授 約翰約翰 布洛克布洛克4. “人體商業(yè)化是人類經(jīng)濟(jì)活動(dòng)中無(wú)與倫比人體商業(yè)化是人類經(jīng)濟(jì)活動(dòng)中無(wú)與倫比的成就的成就, 毫無(wú)疑問(wèn)毫無(wú)疑問(wèn), 克隆技術(shù)的出

17、現(xiàn)將為克隆技術(shù)的出現(xiàn)將為世人創(chuàng)造一個(gè)最為廣泛和深遠(yuǎn)的市世人創(chuàng)造一個(gè)最為廣泛和深遠(yuǎn)的市場(chǎng)。場(chǎng)?！?英國(guó)英國(guó)經(jīng)濟(jì)學(xué)家經(jīng)濟(jì)學(xué)家雜志雜志Do you know about the procedure works of a sheep? Reproductive cloning is intended to produce a c_ of an existing a_ or a plant. Reproductive cloning of animals is a_ for technology and farming as well as for cloning e_ animals. But reproductive cloning of human beings is specifically f_ by law in most c_. opynimalndangeredllowedorbiddenountriesTherapeutic (治療的治療的) cloning is to produce a healthy copy of a s_ persons tissue (肌肉肌肉組織組織) or organ