新人教版选修八-Unit-2-Cloning-Reading[课件].pptVIP

Twins They are born naturally and identical in sex and appearance. Reading Natural clone is one that occurs  in a natural form of cloning  without human help. Man-made clone is one that produced through human intervention(介入) . In pairs, look at these pictures and discuss which ones are natural clones and which ones are man-made. Explain how they differ. Discussion A strawberry plant Growing new plants Twins Dolly the sheep She was cloned while the others were born naturally. Dolly was a ______ sheep. cloned How does Dolly differ from other sheep? Reading Listen to the tape and find out the main idea of each paragraph. Cloning is a way of making an exact copy of another animal and plant. What is cloning ? It happens both in ______ and in_______. They can be cloned by ________ and _______. plants animals themselves humans Natural clone Man-made clone Para 1 The definition of cloning 1.How many major uses do cloning have? Firstly, …commercial… Secondly, …research… 2. When was the cloning of Dolly the sheep born? Para 2 1996 The major uses and procedures of cloning At first, the fact that Dolly developed ______ in a natural way was __________. Later, the news _____she lived for six years, half the length of the life of the ______ one was __________. Finally, the problem that occurred to the scientists was that a cloned animal lives_____________ the original one. Para 3 The problems of Dolly normally encouraging orginal that as long as / shorter than / longer than disturbing shorter than The word “controversial” in para 4 probably means ____________. A. complicated B. arguable C. important Para 4 The impact of Dolly True or false: 1 People feared that Cloned Hitlers would do harm to the world. 2 All the research into human beings will be forbidden. 3 Some countries will use cloning in a wise way. Para 5 People’s reaction to cloning Many governments forbade reserch into human beings