Reading CLONING: WHERE IS IT LEADING US? Unit 2 Cloning

Do you enjoy watching TV series ? Have you ever seen Journey To The West ? Warming up Monkey King Clone

What is a clone ?

natural clone

man-made clone

Dolly 1996

2000

2001

2002

2003

2003 cloned mule

2003 cloned deer

2003, Italy

2005 Cloned dog

2005 Horse North America

Natural clone Man-made clone one that occurs from the “parent ” in a natural form of cloning without human help. one produced through human intervention( 介 入 ).

The birth of Dolly How is a clone produced? Pre-reading egg cell 卵细胞 nucleus 细胞核 somatic cell 躯干细胞 embryo 胚胎 unfertilized cell 未受精卵子 culture medium 培养基

Which sheep is Dolly’s mother?

Reading What is clone? Skim the text and decide if they are true or false. 1 Fast reading

1 Cloning means making a copy of an animal or a plant. 2 Gardeners can make a lot of money by cloning plants. 3 Cloning animals is as complicated as cloning plants. 4 Dolly the sheep was the first successful clone of a mammal. 5 Natural clone happen in animals as well as in plants. F T F T T exact … another T or F commercial more (…than…) breakthrough

2 Careful reading 1) Read the text again and find out the main idea of each paragraph.

Para. 1 Para. 2 Para. 3 Para. 4 Para. 5 Cloning is a way of making an exact copy of another animal and plant. Cloning has two major uses. The problems of Dolly. The effect of Dolly It is forbidden to clone human being.

Careful reading 2) Reading the text again and find the answer to each of the following question. Give a reason. A.Main idea B.Details C.Judgment

1. 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 D Main idea Para5

2 ． Which of the following statements about cloning is not true according to the text? A. Cloning is something that has been developed quite recently. B. Twins that look exactly the same are originally from the same egg. C. Cloning is used by gardeners to make more money ． D. AnimaI cloning is much more difficult than plant cloning ． Details has always been

3 ． The Cloning of Dolly the sheep succeeded because ____. A. its 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 Para 2

4. The lamb is the clone of the cell from sheep B because _____. A. it provides the egg cell B. it gives birth to the lamb C. it provides the nucleus D. it is a female sheep

5. The sheep that donated the somatic cell most probably lived _____ years ． A.3 B. 6 C. 9 D.12 Judgment Para 3

6. Which of the follow is NOT a problem or danger of cloning mentioned in the text? A. Evil leaders may want to clone themselves. B. Animal clones may develop the illness of older animals and may die younger than the donor animals. C. There are moral objections to cloning human beings. D. Too much cloning may lead to the destruction of the balance of nature.

7. Which of the following is not an advantage of cloning? A.Cloning can be used for medical purposes. B.Large quantities of food can be produced by cloning. D. Famous persons who have passed away can be cloned. A.Cloning can help keep animals from becoming extinct.

8 In the second paragraph, the word “straightforward” means ____. A. uncomplicated B. honest C. frank D. difficult

9. We can infer from the last three paragraphs that ___. A. The normal development of Dolly had no effect on the cloning of other species. B. Dolly’s serious disease and final death disturbed the whole world. C. Dolly successfully cloned a new lamb with the help of cloning scientists. D. There were arguments about animals about animal cloning and concerns about the future of cloning.

10. What about the writer’s attitude toward cloning in this passage? A.The writer is against cloning. B.The writer is in favour of cloning. C. The writer does not state any personal opinion about cloning. D. The writer is in agreement with cloning.

What’s your opinion of cloning? Give a reason.

Discussion Look at these pictures, and discuss this question with your partner. Is cloning people a good thing or a bad thing?

1. Read the text aloud and recite the key sentences in the text. 2 Write a passage titled Is cloning good or bad? Your passage should include the following. 1) Disadvantages of cloning 2) Advantages of cloning 3) Your opinion of cloning? Give a reason. Homework