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课件网) Lesson 29: DNA－The Story of You Unit 5 Look into Science 单词: DNA, blueprint, general, complex, twin, repeat, pattern, identify, related, grandson, granddaughter, instruction 短语: in general, except for, be related to, billions of 句子: （1）In general, a blueprint is a drawing that shows how to put a house together with many different parts. （2）Your DNA has billions of instructions that explain why you are the way you are. Learning Goals 1 能用英语流利地讲述与DNA相关的生物知识。 2 Free Talk What do you know about DNA What can scientists do with DNA Presentation When you build a house, you use a blueprint. What’s a blueprint In general, a blueprint is a drawing that shows how to put a house together with many different parts. DNA is the blueprint of life. This is the shape of DNA. Do you think it’s magic But building a living thing is far more complex than building a house. It takes millions of years for nature to change the DNA in living things to make them fit the world they live in. How tall are you What colour are your eyes What size are your feet All these things are strongly influenced by your DNA before you are born! DNA is fantastic! ·Except for some twins, every living thing has its own unique DNA. ·Some health problems can be caused by problems in your DNA. Scientists can look for these problems and, sometimes, help you before you become sick. In the future, scientists might be able to change your DNA. ·There are copies of your DNA in every part of your body. For example, your finger has the same DNA as your hair. ·You have your own unique DNA, but it repeats patterns from your parents’ DNA. From your DNA, scientists can identify not only you, but also people who are related to you. Your parents and grandparents are related to you, and you have their DNA. When you have a grandson or granddaughter, he or she will have your DNA. Your DNA has billions of instructions that explain why you are the way you are. It’s one of the most amazing things on the earth! Your DNA comes from your parents. Vocabulary DNA 脱氧核糖核酸 blueprint n. 蓝图 general adj. 总的；普遍的 complex adj. 复杂的 twin n. 双胞胎之一 repeat v. 重复；复述；背诵 pattern n. 模式；形式 Vocabulary identify v. 确认；鉴定 related adj. 有关的；相关的 grandson n. 孙子；外孙 granddaughter n. 孙女；外孙女 instruction n. 指示；说明 in general 一般而言；通常 except for 除……之外 be related to 与……相关 billions of 数十亿计的；大量 Structures and Expressions Let’s do it! 1. Read the lesson and answer the questions. 1. What is a blueprint 2. Which is more complex, building a living thing or building a house A blueprint is a drawing that shows how to put a house together with many different parts. Building a living thing. 3. Do some twins have the same DNA 4. Is it possible to change your DNA 5. Whose DNA is related to yours Yes, they do. Yes. In the future, scientists might be able to change our DNA. My paren ... ...
