冀教版九年级英语Unit5 Lesson 29DNA-the story of you(共16张PPT).ppt

1、What do you know about DNA?What can scientists do with DNA?DNAblueprint 蓝图general adj.一般的、普遍的repeat 重复，复述twin 双胞胎之一complex 复杂的identify确 认、鉴别instruction指示、说明pattern模式外孙、孙子外孙女、孙女相关的、有关的grandsonrelatedgranddaughter1.What is a blueprint?2.Which is more complex,building a living thing or building a house

2、?3.Do some twins have the same DNA?4.Is it possible to change your DNA?5.Whose DNA is related to yours?Group Work1.In general,a blueprint is a drawing that shows how to put a house together with many different parts.in general-一般而言，概括说来(通常置于句 首）。也可用generally speaking来表示。2.But building a living thing

3、 is far more complex than building a house.比较级前可以用much,even,still,far,a bit,a little,a lot等词加 以修饰。3.Except for some twins,every living thing has its own unique DNA.except for 意思是“除.之外，要不是由于”排出不同类的except “除.之外”,排除同类。一般不用于句首。4.From your DNA,scientists can identify not only you,but also people who are

4、related to you.a.Not onlybut also不但。而且。连接两个相同的成分或两个分句。当接两个主语时，谓语动词和后面的主语保持一致。Eg;Not only you but also I am a teacher.b.Relate to 涉及，有关Eg;The story related to the Second World War.Write a short passage about what we learnt today.Try to tell what it is,where it is from,.Today,we talked about_.Its the_

5、of_.Its _.Every _ has its own_ DNA.Some illness can be _by problems in your DNA.So _ might be able to_your DNA.You have your own DNA,but it_ pattens from your_ DNA.From your DNA,scientists can_the people who are_ you.Your DNA explains why you are the way you are.Thinking:Is it a good idea to change the DNA of the food we eat?Finish your writing and your exercise book;Do the survey about the changing DNA.