Unit2 Cloning课件.pptVIP

Unit2 cloning;The important events in animal cloning history;In 1952 tadpole (蝌蚪） was cloned . It is the first animal to be cloned;In 1963 , an Asian carp(鲤鱼） was cloned . Ten years later, a Chinese scientist named Tong dizhou cloned a European carp. ;1978年7月25日,世界上第一个试管婴儿路易丝·布朗在英国出生 ;路易丝·布朗现已33岁 ; In 1996, a sheep called Dolley was born. It is the first mammal to be cloned. It is considered to be the greatest success in the development of cloning. ;;A macaque （猕猴）was cloned in 2000. Later scientists cloned many monkeys . ; 2000年·人类近亲被克隆美国俄勒冈的研究者用与克隆多利羊截然不同的方法克隆出猴子Tetra ;;Mules (骡子） have no ability to give birth to a baby. A mule was cloned in 2003. It is the first animal which lack fecundity (生育能力）to be cloned. ;;;Cloning: Where is it leading us?;What do you want to know about cloning?;;Scan the text to find out the answers to the following questions. ;;3.The sheep that donated the somatic cell most probably lived ________years. A. 3 B. 6 C. 9 D. 13;4. Which of the following is not an advantage of cloning? Cloning can be used for medicine purposes. Large quantities of plants can be produced by cloning. Cloning can help keep animals from becoming extinct. Famous persons who have passed away can be cloned.;;6.The writer’ s point of view in this reading passage: Positive. Negative. Objective. Indifferent.;;Problems or dangers of cloning;;;;;;Important sentences:;4.On the other hand, Dolly’s appearance raised a storm of objections and had a great impact on the media and public imagination. 5.It suddenly opened everybody’s eyes to the possibility of using cloning to cure serious illnesses and even to produce human beings. 6.Although at present human egg cells and embryos needed for cloning research are difficult to obtain. 7.However, scientists still wonder whether cloning will help us or harm us and where it is leading us.;完成句子;短语：