《21世纪大学英语 21st Century College English》课程教学资源（PPT课件讲稿）Book 1 Unit 10 Text A Cloning - Good Science or Baaaad Idea

2lst Century College English: Book I Unit 10. Text A Cloning: Good Science or Baaaad Idea CLICI

Unit 10 : Text A 21st Century College English: Book 1 Cloning: Good Science or Baaaad Idea

Lead-in Activities o Text Organization Reading Writing skills o Language Points Guided Practice o Assignment

• Lead-in Activities • Text Organization • Reading & Writing Skills • Language Points • Guided Practice • Assignment

Lead-in activities Questions for Discussion What is cloning? What achievements have scientists made in cloning? What's the good of cloning to man kind? What do you think about cloning humans?

Lead-in Activities Questions for Discussion • What is cloning? • What achievements have scientists made in cloning? • What’s the good of cloning to mankind? • What do you think about cloning humans?

Text Organization The Structure of Text A Para. 1-2 Birth of Dolly: breakthrough in cloning Para.3 Accomplishment turned out to be controversial Para. 4 9 Wilmut's success on genetics Para. 10-13 Great prospects of cloning techniques Para 14-18 Arguments about human cloning

Text Organization The Structure of Text A Para. 1~2 Birth of Dolly: breakthrough in cloning Para. 3 Accomplishment turned out to be controversial Para. 4~9 Wilmut’s success on Genetics Para. 10~13 Great prospects of cloning techniques Para. 14~18 Arguments about human cloning

Reading writing skills 1. Scanning for organization 2. Identifying the support to main Idea Many paragraphs written in English are arranged in the same way: a Main Idea is expressed in topic sentence and then Support is given to make this idea clear and to convince the reader that it is true Practice. Review Text a again and find out the support given to each of following main ideas/ topic sentences

Reading & Writing Skills 1. Scanning for organization 2. Identifying the Support to Main Idea Many paragraphs written in English are arranged in the same way: a Main Idea is expressed in topic sentence and then Support is given to make this idea clear and to convince the reader that it is true. • Practice: Review Text A again and find out the support given to each of following main ideas/ topic sentences

Reading writing skills 3. Prediction illustration according to the paragraph pattern analyzed in Reading analysis, try to give out as many supports to the topic sentence(main idea) as possible Topic sentence(general idea): There are many advantages to clone human Support(detailed As human organ donor To make copy of someone who has cancer To give child to the couples who have none To make identical-twin of someone

3. Prediction + illustration According to the paragraph pattern analyzed in “Reading Analysis”, try to give out as many supports to the topic sentence (main idea) as possible. • Topic sentence (general idea): There are many advantages to clone human. • Support (detailed) As human organ donor To make copy of someone who has cancer To give child to the couples who have none To make identical-twin of someone Reading & Writing Skills

Intensive stud Cloning: Good Science or Baaaad ldea by Chana Freimans Stiefel I Just before President Clinton heads to the hospital for knee surgery, he asks another bill clinton to meet russian President Boris yeltsin at an overseas meeting. Meanwhile. a third bill Clinton is out playing golf, while a fourth is helping daughter helsea with a science project

Intensive Study Cloning: Good Science or Baaaad Idea by Chana Freimans Stiefel 1 Just before President Clinton heads to the hospital for knee surgery, he asks another Bill Clinton to meet Russian President Boris Yeltsin at an overseas meeting. Meanwhile, a third Bill Clinton is out playing golf, while a fourth is helping daughter Chelsea with a science project

Intensive stud 2 Sound far-fetched? That day may come. Scientists in Scotland recently announced that, for the first time, they have cloned an exact copy of an adult sheep. The cloned baby lamb, named Dolly, has the exact same genes as the adult sheep from which she was cloned. In other words, the two are identical twins; only dolly is six years younger. The goal of embryologist lan wilmut, the lead scientist, is to develop a way to raise identical sheep that produce medications for humans

Intensive Study 2 Sound far-fetched? That day may come. Scientists in Scotland recently announced that, for the first time, they have cloned an exact copy of an adult sheep. The cloned baby lamb, named Dolly, has the exact same genes as the adult sheep from which she was cloned. In other words, the two are identical twins; only Dolly is six years younger. The goal of embryologist Ian Wilmut, the lead scientist, is to develop a way to raise identical sheep that produce medications for humans

Intensive stud 3 A week after wilmut's announcement, scientists in Oregon disclosed that they had used a different technique to clone monkeys, close cousins of humans. Faster than you can say Frankenstein, these accomplishments triggered a worldwide debate: Should scientists be allowed to clone animals? Will humans be next? Is cloning unethical and dangerous--or is it a valuable research tool?

Intensive Study 3 A week after Wilmut’s announcement, scientists in Oregon disclosed that they had used a different technique to clone monkeys, close cousins of humans. Faster than you can say “Frankenstein,” these accomplishments triggered a worldwide debate: Should scientists be allowed to clone animals? Will humans be next? Is cloning unethical and dangerous--or is it a valuable research tool?

Intensive stud 4 All attempts at cloning were largely unsuccessful until 1984. Thats when a scientist in Denmark separated cells from a sheeps embryo. An embryo is an early stage of development in which cells are busy dividing and "transforming" inte specialized cells like skin, eyes, or muscle cells 5 Unlike a skin cell, an embryo is on its way to becoming a complete living thing. The Danish scientist combined an embryo cell with an egg cell from another sheep. He implanted the fused cell -- then a newly growing embryo - into a grown female sheep. To much surprise, the embryo grew into a baby lamb. Since then, other scientists have used embryos to clone cattle, pigs, goats, rabbits-- and, now, even monkeys

Intensive Study 4 All attempts at cloning were largely unsuccessful until 1984. That’s when a scientist in Denmark separated cells from a sheep’s embryo. An embryo is an early stage of development in which cells are busy dividing and “transforming” into specialized cells like skin, eyes, or muscle cells. 5 Unlike a skin cell, an embryo is on its way to becoming a complete living thing. The Danish scientist combined an embryo cell with an egg cell from another sheep. He implanted the fused cell -- then a newly growing embryo -- into a grown female sheep. To much surprise, the embryo grew into a baby lamb. Since then, other scientists have used embryos to clone cattle, pigs, goats, rabbits-- and, now, even monkeys