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Unit 2 Cloning

Unit 2 Cloning. The return of the dinosaurs ?. Revision. What are the advantages of cloning?. Have plants of similar quality to sell. Useful for research on new plant species. Make endangered species keep on. Help families who want to have a child. Have cures for serious illnesses

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Unit 2 Cloning

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  1. Unit 2 Cloning The return of the dinosaurs ?

  2. Revision What are the advantages of cloning? Have plants of similar quality to sell. Useful for research on new plant species. Make endangered species keep on. Help families who want to have a child. Have cures for serious illnesses in humans.

  3. Lead-in Have you seen the film Jurassic Park（侏罗纪公园）?

  4. 1.Can you see them in our real life? Why? 2.Do you think it is possible to clone dinosaurs? If yes, do you think that’s good for human beings? Why?

  5. Listening The writer of the text_____ A. is excited by the possibility of cloning fierce and extinct animals B. believes that extinct animals can be brought back to life by cloning C. thinks it impossible or unsuitable to clone extinct animals like dinosaurs D. dreams of dinosaurs returning to the earth Listen to the text , then choose the correct answer.

  6. Scanning • Scientists are still experimenting with cloning mammals because they think it can make money. • The animals that have disappeared from the earth, like dinosaurs, can be brought back to life through cloning. • If we can clone any extinct animals, we should let them live in a zoo. Read fast, then tell me it’s true or false. F F F

  7. 1. The film Jurassic Park is popular because _____. A. people are interested in the subject of cloning B. all the actors are dinosaurs C. it was directed by a scientist who clones dinosaurs D. it proves very interesting Detailed reading Read carefully, then Choose the correct answer

  8. 2. Which of the following is true? ____ Mice were cloned in 1981. B. Dolly the sheep was the first cloned animal. C. The name of the cloned cow is “Bison” D. China was successful in cloning mammals.

  9. 3. The reasons why a group of cloned animals all die of the same illness do NOT include____. A. they have the same arrangement of genes B. there isn’t enough diversity in the group for it to overcome illnesses C. the illness is a new one D. their arrangement of genes can not resist that new disease

  10. 4. We can infer from the text that____ A. scientists are experimenting to clone dinosaurs B. dinosaurs will never return to the earth C. cloned animals will only live in the zoo D. the DNA of dinosaurs can only survive 10 000 year

  11. Consolidation Why can't the dinosaurs return to the earth? • We don’t have perfect DNA. • Their genes arrangements are the same. And they might die of the same illness. • They don’t have a natural habitat.

  12. Discussion These animals are extinct ones. Which one should be brought back to life? And why? Discuss with your partner. The example on the textbook might help you. Dodo bird (1755) Great Auk (1844) Auroch (1627) Quagga (1883)

  13. Homework Finish Ex. 2, Page16 Find out the important language points.

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