Unit 2 Cloning

Cloning is a way of making an exact _____ of another animal or plant. What is Cloning? copy

______________ ： is one that occurs in a natural form of cloning without human help. __________________:is one that is produced through human intervention( 介入 ). Two kinds of clones Warming up Natural clone Man-made clone

Look at these pictures and discuss which ones are natural clones and which ones are man-made. Explain how they differ. Discussion

A strawberry plant _________ clone The new plants that grow from the runners （ 长匐茎植物） are exact copies of the o______( 原始的 ) plant. Natural riginal

Growing new plants ___________ clone Natural

Twins They are born naturally and identical ( 一模一样 ) in ____and ___________. sex appearance _________ clone Natural

Dolly was a ______ sheep. cloned The sheep Dolly In 1996, Dolly was born. It is the first mammal to be cloned. It is considered to be the greatest success in the development of cloning.

cloning Where is it leading us? Book 8 unit 2

A. The impact of Dolly. B. Cloning is a way of making an exact copy of another animal and plant. C. People’s reaction to cloning. D. Cloning has two major uses. E. The problems of Dolly. Paragraph1 Paragraph2 Paragraph3 Paragraph4 Paragraph5

The main idea of each paragraph. A. The impact of Dolly. B. Cloning is a way of making an exact copy of another animal and plant. C. People’s reaction to cloning. D. Cloning has two major uses. E. The problems of Dolly. Paragraph1 Paragraph2 Paragraph3 Paragraph4 Paragraph5

The main idea of the text is____ A. animal cloning is very valuable and can benefit the world. B. animal cloning could be misused by bad people so it must be forbidden C. animal cloning is well developed because Dolly the sheep was born. D. animal cloning raised arguments and scientists are not sure about its future. 主旨大意 Where is it leading us?

scanning Reading

Cloning is a way of making an exact copy of another animal and plant. 1. What is cloning ? 2. It happens both in ______ and in_______. They are both _______ plants animals Para 1 The definition of cloning natural clones

1.The major uses: Firstly, …commercial… Secondly, …research… Para 2 The major uses and procedures of cloning 2.In this paragraph, the word “straightforward” means ____. A. uncomplicated B. honest C. frank D. difficult Cloning plants is straightforward while ( 表对比 ) cloning animals is very complicated.

The cloning of Dolly the sheep succeeded because____. A. it’s easier to clone a sheep than other animals B. the scientists were determined and worked hard with patience C. the scientists were rewarded and got lots of money D. many other attempts to clone mammals failed 细枝末节 Their determination and patience of the scientists paid off.

First, the fact that Dolly developed ______ in a natural way was __________. Later, the news that Dolly had become seriously ill was __________. Finally, the problem that occurred to the scientists was that a cloned animal lives_____________ the original one. Para 3 The problems of Dolly normally encouraging A. as long as B. shorter than C. longer than disturbing shorter than

4. The sheep that donated the somatic cell most probably lived ____ years. A. 3 B. 6 C. 9 D. 13 推理判断 Altogether Dolly lived six and a half years, half the length of the life of the original sheep.

The word “controversial” in para.4 probably means :____________. A. complicated B. arguable C. important D. traditional Para 4 The impact of Dolly Its appearance raised and the media and public imagination. a storm of objections had a great impact on

True or false: 1. People feared that Cloned evil leaders would do harm to the world. 2 All the research into human beings will be forbidden. 3 Some countries will use cloning in a wise way. Para 5People’s reaction to cloning some governments forbade research into human beings.

Further understanding

the author does not state any personal opinion about cloning. A. Objective (be fair) B. Negative (be against it) C. Positive (be in favor of it) The writer’s attitude towards cloning Because ____________________________ _____________________________________

To Clone or not to clone ， that is a question.

Practice activity: Debate Are you in favor of cloning or against cloning? State your point of view on it. ＶＳ ForAgainst

Advantage(good points) Dis advantage(bad points) It can make more profits for gardeners and farmers We could use cloning to cure illness Cloning can help save endangered animals Cloning can provide a copy of a child for a couple whose child has died Cloned animals is easy to get ill and die young Against nature and moral Animals clones may develop the illness of older animals Evil leaders may want to clone themselves People are afraid that scientists will create thousands of copies of the same person. Cloning is a great breakthrough to human beings

Homework : 基础写作 写作情景：今天我们班同学讨论了有关克隆的问题。同 学们热烈发表了评论和表达了自己的看法；他们主要 有两种不同的意见： 写作内容： 请同学们将辩论的内容整理成一篇作文。 开头已给出。 Today,we have a heated discussion about cloning and opinions are divided on the question. ________________________________ _______ However,________________________ ________________________________ personally, I _____________________

Thank you Bye-bye