Unit 5 Look into Science Lesson 29 DNA—The Story of You课件(共19张PPT) 冀教版九年级全一册

(共19张PPT)
Unit 5
Lesson 29
DNA—The Story of You
1.学习目标
3.重点探究
2.自主学习
学习导航
5.当堂检测
6.课堂总结
4.拓展提升
新课导入
What do you know about DNA
学习目标
1. 掌握本课新单词：blueprint, general, complex, repeat, twins, pattern, identify, instruction.
2. 掌握本课新短语：in general, be influenced by, except for, be related to.
3.了解更多关于自然、DNA的事实
自主学习
blueprint
general
complex
twin
repeat
pattern
identity
related
grandson
granddaughter
instruction
n.蓝图
adj.一般的；普遍的
adj.复杂的
n.双胞胎之一；孪生儿之一
v.重复；复述；背诵
n.模式；形式
v.确认；鉴别
adj.有关的；相关的
n.孙子；外孙
n.孙女；外孙女
n.指示；说明
Key words
in general
except for
be related to
billions of
一般而言；通常
除……之外
与……相关
数十亿计的；大量
Key phrases
重点探究
Do you want to know the story of you
This is the shape of DNA.
Do you think it's magic
Your DNA comes from your parents.
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.
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!
1 Read the text and answer the questions below.
1.What is a blueprint
In general, a blueprint is a drawing that shows how to put a house together
with/using many different parts.
2.Which is more complex, building a living thing or building a house
Building a living thing.
3.Do some twins have the same DNA
Yes, they do.
4.Is it possible to change your DNA
Yes, it is. In the future,scientists might be able to change our DNA.
After reading
Let's Do It!
2 Fill in the blanks with the phrases in the box.
1. Your homework is quite good _________ a few spelling mistake.
2. _______ the young _______ the old like pop music.
3. Kate's hair is ______ colour ______ her sisiter's.
4. ________, women live longer than men.
5. ______ many difficulties remain, we can overcome them.
6. Is wealth ________ happiness
in general except for not only... but also
related to even if the same …as
except for
Not only but also
the same as
In general
Even if
relate to
Changing DNA
Do you know DNA can be changed Have you ever seen a pig with a dog's body Of course not! Pigs and dogs can't have babies together. ______ But now, scientists can do it. Scientists can take DNA from one kind of animal and put it into another kind of animal. They can design new plants by combining the DNA of other plants. ______ Some scientists are worried. They say we need to know more about DNA before we start changing it. ______ But what if the plants are bad for humans, too
A
C
B
Let's Do It!
3 Complete the passage with the sentences in the box.
A. Their DNA can't combine.
B. We can make plants that are bad for pests.
C. They can even combine the DNA of a plant and an animal.
拓展提升
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；总的来说
同义短语：generally speaking
e.g. In general, I agree with you.
或：Generally speaking, I agree with you.
2. All these things are strongly influenced by your DNA before you
are born!
influence 及物动词，(间接的、潜移默化的)影响
短语：be influenced by 受……的影响
e.g. He was influenced by his father to be a teacher.
拓展：influence 名词
短语：have an influence on sb./sth.
3. Except for some twins, every living thing has its own unique DNA.
短语：except for 除……之外
e.g. The movie is good except for the ending.
4. From your DNA, scientists can identify not only you, but also
people who are related to you.
短语：be related to 和……有联系；和……有关
e.g. I'm not related to him anymore.
拓展：relate to 把……和……联系起来
当堂检测
一、用所给单词的适当形式填空。
1._____(介词)general, he is never late for school.
2. Do you know who is the _________(own) of the house
3. Your body uses this pattern _________ (build) itself.
4. Some health problems come from your family’s DNA. _________(science) can look for these problems in your DNA.
In
owner
to build
Scientists
二、完成句子。
1. 一般来说，女人比男人活得更长。
____________, women are live longer than men.
2. 你的作文相当好，除了一些拼写错误外。
Your composition is quite good ____________ a few spelling mistakes.
3.现如今，不管是年轻人还是老年人都喜欢流行音乐。
____________ the young ____________ the old like pop music nowadays.
4.我认为财富与幸福没关系。
I don’t think wealth ____________ happiness.
In general
except for
Not only
but also
is related to
课堂总结
Unit 5
Lesson 29
1. 掌握本课新单词：blueprint, general, complex, repeat, twins, pattern, identify, instruction.
2. 掌握本课新短语：in general, be influenced by, except for, be related to.
了解更多关于自然、DNA的事实