1、Warming up1.How much do you know about clone?What is clone?It is a way of making an exact copy of another animal and plant.1.Do you want to be cloned or not?Why?克隆”一词源于“Clone”的音译，指的是人工诱导动、植物的无性繁殖过程，这门生物技术就叫克隆技术。无性繁殖是指不经过雌雄两性生殖细胞的结合，只由一个生物体产生后代的生殖方式，如：由植物的根、茎、叶等经过压条或嫁接等方式产生新个体。绵羊、猴子和牛等动物没有人工操作是不能进行无性
2、繁殖的。2.Do you want to be cloned or not Why?3.In pairs,look at these pictures and discuss which ones are natural clones and which ones are man-made.Explain how they differ.the twins are natural clonesThe twins were born at the same timeDolly是世界上第一例用体细胞乳腺上皮细胞,通过细胞核移植技术,在复杂的人工操作下,得到的一只小绵羊。一株草莓依靠它沿地“爬走”的匍匐茎,一年内就能长出数百株草莓苗富贵竹插枝即活仙人掌每块落地就生根
