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《Warming up、Pre-reading、Reading、Comprehending》集体备课PPT课件优质课下载
In 1996, a sheep called Dolly was born. It is the first mammal to be cloned. It is considered to be the greatest success in the development of cloning.
A strawberry plant
The new plants that grow from the runners are exact copies of the original plant.
Growing new plants
The cutting that the gardener is taking will produce another plant that is an exact copy of the original plant (man-made clone)
Twins
They are identical in sex and appearance and are good examples of nature clones. Twins carry the same genetic information.
What is the difference among them ?
Natural clone
Man-made clone
clone
Natural clone is one that occurs from the “parent ” in a natural form of cloning without human help.
Man-made clone is one that produced through human intervention(介入) .
Reading
Write the letter “T”if the statement is true. Write “F”if it is false.
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.
F
F
T
4. Dolly the sheep was the first successful clone of a mammal
5.Natural clones happen in animals as will as in plants.
T
T