Unit 5 Look into Science Lesson 29 DNA — The Story of You 课件25张

(共25张PPT)
We look different,
because we have different DNA
We are the twins, we have the same DNA.
This is the shape of DNA.
Do you think it’s magic?
Think about it:

1. What do you know about DNA?

2.What can scientists do with DNA?
Look into Science
Unit 5
DNA－The Story of You
Lesson 29
Zhaocun Junior High School
Liu Xiya
Your DNA comes from your parents.
Where does your DNA come from?
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.
被深深影响
DNA 脱氧核糖核酸 blueprint n. 蓝图
general adj. 一般的 complex adj.复杂的
twin - twins n.双胞胎 repeat v. 重复,复述,背诵
pattern n. 模式，形式 identify v.确认，鉴别
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
Review Words:
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?

In general,A blueprint is a drawing that shows how to put a house together with many different parts.
Building a living thing.
Yes, they do.
Reading: Read and answer.
一般来说，蓝图是
一张显示如何将一座房子的许多不同部分组装在一起的图画。in general 意思是 “一般而言，概括说来（通常置于句首）”
In general,girls cry more easier
than boys.
Yes. In the future,scientists might be able to change your DNA.
My parents and grandparents.
DNA is fantastic.
Why?
Language points:
1. Except for some twins, every living thing has its own unique DNA. 除了一些双胞胎之外， 每个生物 都有它独特的DNA.
except for , 意思是“除了 ……以外，除去 ……，不包括它后面的内容 ”用于表示对主要部分的肯定和对部分的否定。它表示不同类事物 之间的关系。
e.g . His article is good except for a few grammar mistakes.
跟踪训练

1. Mr. Smith is a good man, ______ his bad temper.
A. except B. except for C. besides D. beside
B
2. From your DNA , scientists can identify not only you , but also people who are related to you.
从你的DNA中，科学家们不但能够辨认出你，而且能够辨认出和你有血缘关系的人。
(1). not only… but also ,意为“不但…而且”，它可以连接句中句子成相同的部分。本句中它连接了两个并列的宾语，其中第二个宾语中包含一个who 引导的定语从句.
(2). be related to 意为“与……有关”，后加名词或代词做介词to 的宾语
e.g . Tigers are not related to wolves.
跟踪训练：
2. 她不仅会唱中文歌曲，还会唱英文歌曲.
She can sing ________Chinese songs_______ English songs.
。
not only but also
3. 我想他们与这件事情有关。
I think they ______ related ______ this matter.
are to
3.Your DNA has billions of instructions that explain why you are the way you are. 你的DNA 中有数十亿个指令， 来解释你为什么是你现在这个样子。
(1).way在本剧中意思是“情况，状态”。

(2). billions of …数以亿计的…表示一个概数
类似的还有 ： hunderds of…,数百的
thousands of…, 数千的
millions of…， 数百万的
4. But building a living thing is far more complex than building a house. 但是创造一个生物远比建造一座房子复杂得多。
“ far + 比较级” 意为“……得多”，“ 此外，比较级前还可用much, even， still, a bit , a little , a lot 等词或词组加以修饰。
e.g. My brother is much elder than me . 我的哥哥比我大得多。
跟踪训练
4. 这个单元比那个单元容易得多。
This unit is ___________easier than that one.
5. 这本书比那本有趣得多。
This book is ___________ more interesting than that one.
far / much
far / much
It’s time to practice!
Fill in the blanks with the phrases in the box.
in general　except for　not only…but also
related to 　even if　the same…as
Let’s do it 2.
1．Your homework is quite good __________a few spelling
mistakes.
2．________the young ________the old like pop music.
3．Kate’s hair is________ colour _____her sister’s.
4．___________，women live longer than men.
5．________ many difficulties remain，we can overcome them.
6．Is wealth ___________happiness?
except for
Not only but also
the same as
In general　
Even if
related to
一、根据句意及首字母提示完成单词
1．Lucy and Lily are t ______．They look the same.
2．In g______，women do it more easily than men.
3. It’s important for you to r______the text.
4．Mike has a granddaughter and a g ________．
5．Before you take this medicine, you must read the
i _____________.
　　
eneral
wins
epeat
randson
nstructions
is related to
三、根据汉语意思完成句子
6.他和我家有亲戚关系。
He ________ ________ ________ my family.
7．凯特和她姐姐有同样颜色的头发。
Kate has ________ ________colour of hair
________her sister.
the same
as
8. 数十亿年前，地球只是一团尘埃。
________ ____years ago, the earth was just a cloud of dust.
9．他的话对她有很大影响。
She was ________ ___________ by his words.
10．(中考·盐城)李明不仅聪明而且勤奋。
Li Ming is________ ________ ________ ________
________ ______________．
strongly influenced
Billions of
not only clever but
also hard?working
二、单项选择
11．My article is good ________some spelling mistakes.
A．except　 B．except for
C．Beside 　D．besides
12．(中考·六盘水) Not only you but also he ________ the
secret.
A．knows B．know
C．have known D．to know
B
A
We all Know!
Your DNA comes from your parents.
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.
Free Talk
Is it a good idea to change the DNA of the food we eat?
1
1.Write the
composition
down in your
book.
2
Read this article
at least three
times.
3
Finish “Let’s do it” NO.3.
Doing the tasks
Homework
In a word.
You DNA has billions of instructions that explain that why you are the way you are. It’s one of the most amazing things on the earth!
-----This is the story of you


Scientific discoveries are making our lives better and better.
Inventions and discoveries have changed the modern world.
Everything has two sides.
It’s never too late to learn.
Nothing is too difficult, if you put your heart into it.
Teacher Motto