Cloning is a way of making an exact copy of another animal and plant. Firstly, gardeners use it all the time to produce commercial quantities of plants. Secondly, it is valuable for research on new plant species and medical research on animals. She seemed to develop normally in the beginning. Then Dolly had become seriously ill.

Dolly lived for six years，half the length of the life of the original sheep. Dolly's appearance raised a storm of objections and had a great impact on the media and public imagination． Governments became nervous and many forbade research into human cloning. VII. Reading the text again to draw a diagram of it and retell the story with your own words

VIII. Closing down by learning more about Dolly

To end this class, let's get to know more about Dolly.

Celebrity Sheep Has Died at Age 6

Dolly, the first mammal to be cloned from adult DNA, was put down by lethal injection Feb. 14, 2003. Prior to her death, Dolly had been suffering from lung cancer and crippling arthritis. Although most Finn Dorset sheep live to be 11 to 12 years of age, postmortem examination of Dolly seemed to indicate that, other than her cancer and arthritis, she appeared to be quite normal. The unnamed sheep from which Dolly was cloned had died several years prior to her creation. Dolly was a mother to six lambs, bred the old-fashioned way.

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