Lesson 29 课件2023-2024学年冀教版英语九年级全册

What do you know about DNA? What can scientists do with 
DNA? DNA blueprint 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 grandson related granddaughter 1. What is a blueprint? 2. Which is more complex, building a living thing or building a house? 3. Do some twins have the same DNA? 4. Is it possible to change your DNA? 5. Whose DNA is related to yours? Group Work 1. 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 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 related to you. a. Not only…but 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_____. It's 
the_____of_____. It's ______.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. $$