人教版选修8Unit 2 Cloning Reading 课件 （共27张）

课件27张PPT。Cloning Unit 2 Dolly, the first mammal to be cloned from adult DNA, was put down by lethal injection on Feb. 14, 2003. Prior to her death, Dolly had been suffering from lung cancer and crippling arthritis (致残性关节炎). Celebrity Sheep DollyDolly是世界上第一例用体细胞———乳腺上皮细胞，通过细胞核移植技术，在复杂的人工操作下，得到的一只小绵羊。Dolly is together with her mother. The kitten in the picture is called Cc. Its name is from “Copycat”. It was born in December 2002. The mule in the picture is the world’s first cloned mule. It was born on 4 May 2003. His name is Idaho Gem. These female pigs are also cloned. They are born on Christmas Day 2001. They are Noel, Angel, Star, Joy and Mary.The pair of calves were born on 5 July 1998 in Ishikawa, Japan. They were two years younger than Dolly, being second adult animal clones in the world.A clone is an animal or plant produced naturally or artificially from the cells of another animal or plant and is exactly the same as it. Cloning is a way of making an exact copy of another animal or plant. The clone has the same DNA as the parent. What’s cloning?Sounds Reasonable?In pairs, look at these pictures and discuss which ones are natural clones and which ones are man-made. Think about how they differ.QuizDolly the sheepA strawberry plantNatural cloneMan-made clone一株草莓依靠它沿地“爬走”的匍匐茎, 一年内就能长出数百株草莓苗。Growing new plantsTwinsNatural cloneMan-made cloneNatural clone is one that occurs in nature without human help. Man-made clone is one that is produced through human intervention (介入).CloneCan you tell the difference between natural clone and man-made clone?Cactus (仙人掌)Pendulum orchid (吊兰)natural clone examplesman-made clone examples I'm celebrity in the history of cloning. Do you know my name?If possible, do you want another person to be exactly the same as you? Why or why not? Discussion1. Clone can be from both natural clone and man-made clone. 2. The sheep, named Kitty was the first successful clone of a mammal. 3. Only strawberries and cactuses (仙人掌) are natural clones. 4. Since Dolly, researchers have cloned a number of large and small animals including cats, rabbits and horses. .A parent can clone a child who is dying of a terminal illness (不治之症). T or F1. 速读文章内容选择正确答案 (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 B B. electricity is needed C. female sheep B provides an egg cell D. three female sheep are used(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 future C. many countries will use cloning in a wise way D. all the research into human cloning will be forbidden(3)Which of the following statements about cloning is NOT true according to the text? A. Cloning is something that has been developed very quickly recently． B. ... ...