M5U3Welcometotheunit教学讲解课件.ppt

1、The island(逃出克隆逃出克隆岛岛)1.rmvbClick here2.rmvb剧情剧情介绍介绍Enjoy a movie trailerDo you know something about cloning(克隆克隆)?Man has created many things and now they are even ready to recreate themselves.“Cloning”is a new biotechnology(生物技术生物技术)which aims to produce an exact copy of an animal or a plant from

2、its own cells.Look at the following pictures and study them.Can you tell what is the main feature of cloning?Can you identify the differences between the cloned animals and normal ones?Dolly is together with her mother.What do you know about Dolly?the worlds first cloned mammal created by Scottish s

3、cientists in 1996 sparked worldwide interest and concern after its birth many countries,including Germany,France,Canada,Switzerland,Austria,Norway and South America,have banned human cloning since Dollys birth died in 2003 because of lung diseaseThe kitten in the picture is called CC.Its name is fro

4、m“Copycat”.It was born in December 2002.The researchers in Texas produced CC with a cell taken from her mother Rainbow.CC was a healthy kitten who grew into a lively affectionate house cat.She is not the exact copy of her clone-mother because they grew up in different surroundings,though the shared

5、the same genes.These female pigs are also cloned.They were born on Christmas Day 2001.They were Noel,Angel,Star,Joy and Mary.Although they are not the first cloned pigs,they are actually the first to be engineered in a way that their organs more suitable for transplantation into humans.Due to the sh

6、ortage of human organs for transplants,many people are dying because some of their organs do not work.It is hoped that the organs from these pigs will be used in humans bodies.The name of the first cloned monkey is ANDi.It is from“inserted DNA”spelt backwards.The playful coffee-coloured monkey was b

7、orn in 2000.The technology is different from thatused for Dolly.Researchers in Oregon,the USA created this first genetically modified monkey by putting a gene form a jellyfish,another species,into six-day-old monkey embryos(胚胎胚胎).From the appearance,the cloned animals are exactly the same as the ori

8、ginal ones.However,some cloned animals were reported to have health problems and died usually young.More examples about cloned animalsThe 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.The mule in the pic

9、ture is the worlds first cloned mule.It was born on 4 May 2003.His name is Idaho Gem.What do you think of the new kind of technology?Does it have anyadvantages or disadvantages?Advantages of cloning:cure many genetic diseases save peoples lives prevent some endangered animals from dying outDisadvantages of cloning:cause ethical problems violate(违背违背)human rights violate the laws of nature Do you think it would be a good idea to clone humans some day?Why or why not?If possible,do you want another person to be exactly the same as you?