Cloning

Clone? Natural clone Man-made clone Natural clone is one that occurs from the “parent ” in a natural form of cloning without human help. Clone? a way of making an exact copy of another animal or plant. Man-made clone Man-made clone is one produced through human intervention(介入) .

natural clones

natural clones

man-made clones

克隆的荧光小猪(左)和正常小猪(右)

Dolly the sheep

Dolly & her daughter Dolly and the Father of Dolly –Ian Wilmut ( 伊恩·威尔姆) 1996 Dolly & her daughter

How does the cloning of Dolly the sheep work?

F Listening F 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 clones happen in animals as well as in plants. F F

Is cloning good or bad for us?

Fill in the chart using the information from the text Fill in the chart using the information from the text. Add one reason of your own in each column. Problems or dangers of cloning Advantages of cloning

Problems or dangers of cloning Animal clones may develop the illnesses of older animals. Animal clones may die younger than the donor animals. Evil leaders may want to clone themselves. There are moral objections to cloning human beings.

Medical cloning could produce cures for serious illnesses in humans. Cloning plants can produce plants of similar quality for sale. Advantages of cloning Cloning plants can be useful for research on new plant species. Cloning can help save endangered animals.

Further Comprehension

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.

2. What about the writer’s attitude toward cloning in this passage? A. The writer is against cloning. B. The writer is in favor of cloning. C. The writer is neutral towards cloning. D. The writer is in agreement with cloning.

3. It can be inferred from the passage that a cloned animal ______. A. usually lives as long as the original one B. usually lives longer than the original one C. usually dies earlier than the original one D. is usually as healthy as the original one

4. What is people's fear about human cloning 4. What is people's fear about human cloning? Which of the following is wrong? A. Cloned Hitlers would do harm to the world. B. Cloned people may be killed at will for medical aid. C. A woman would have difficulty recognizing her real husband. D. Men will die out because a woman can give birth to a baby without a husband.

5. 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.

6. 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 animal cloning and concerns about the future of cloning.

Is it good cloning people? Thinking Oh! My God! I was cloned!