Module 5 Cloning 【美文阅读】 The term cloning des cribes a number of different processes that can be used to produce genetically identical copies of a biological entity(实体；实际存在物). The copied material, which has the same genetic makeup as the original, is referred to as a clone. Researchers have clon ed a wide range of biological materials, including genes,_cells,_tissues and even entire organisms, such as a sheep. Over the last 50 year s, scientists have conducted cloning experiments in a wide range of animals using a variety of techniques. In 1979, researchers produced the first genetically identical mice by splitting mouse embryos in the test tube and then implanting the resulting embryos into the wombs of adult female mice. Shortly after that, researchers produced the first genetically identical cows, sheep and chickens by transferring(使转移；使调动) the nucleus of a cell taken from an early embryo into an egg that had been emptied of its nucleus. It was not un til 1996, however, that researchers succeeded in cloning the first mammal from a mature (somatic) cell taken from an adult animal. After 276 attempts, Scottish researchers finally produced Dolly, the lamb from the udder(牛、羊等的)乳房) cell of a 6 year old sheep. Two years later, researchers in Japan cloned eight calves from a single cow, but only four survived. Besides cattle and sheep, other mammals that have been cloned from somatic cells include: cat, deer, dog, horse, mule, ox, rabbit and rat. In addition, a rhesus monkey has been cloned by embryo splitting. 【诱思导学】 1．What is cloning _____ 2．When was the mammal cloned _____ 【答案】 1.The term clonin g describes a number of different processes that can be used to produce genetically identical copies of a biological entity. The copied material, which has the same genetic makeup as the original, is referred to as a clone. 2.It was cloned in 1996. Period ⅠPreviewing (教师用书独具) ●教学目标 初步掌握本课文中的词汇，浅层次理解课文，了解相关的背景知识。 ●课标解读 本课时主要是通过学生对学案 所给出的内容的学习，了解本课文中所出现的词汇，初步了解课文以及相关的背景知识，对下一堂课对课文的全面理解起到一个铺垫作用。 ●教学地位 本模块的主题是“克隆”， 阅读课文的第一部分介绍小说《弗兰肯斯坦》的故事梗概，第二部分是小说节选。要求学生掌握相关词汇，培养相关语言技能。了解高科技的迅速发展有可能给人类的未来带来巨大的正面或负面影响；增强科学伦理意识，努力学习文化知识，运用科技发展成果为人类的和平、幸福和发展做贡献。 (教师用书独具) ●新课导入建议 T：Look at the pictures and discuss： 1．When was the film made 2．Who was the author of the novel Frankenstein 3．What is the young man in the picture doing 4．What does the monster look like 5．Guess what is the ending of the story 在看图说话的过程中，教师帮助学生复习和学习词汇。 …… ●教学流程设计 导入新课 学生阅读“美文阅读”与“诱思 导学”(见学案第60页)。 学生就“美文阅读”进行讨论，统一答案。 让学生快速阅读课文，(见课本第58－59页)并完成“篇章结构”(见学案第60页)。 师生共同讨论并统 ... ...
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