Unit 5 Lesson 29 DNA—The Story of You 课件 2023-2024学年冀教版九年级英语上册 (共22张PPT，含内嵌音视频)

(共22张PPT)
Unit 5
Lesson 29
DNA—The Story of You
学习目标
预习检测
知识梳理
课堂总结
学习
导航
重点探究
当堂检测
新课导入
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
预习检测
1.Your story is good ____ the ending.
A. but B. besides C. except D. except for
2.—Will you fix up the machine according to the , David
—No problem.
A. instructions B. inventions
C. invitations D. interviews
D
A
3.The country spends ____ dollars helping the poor every year.
A. two billion of B. two billions C. billion of D. billions of
4. “重要的事情说三遍。”can be translated into "Important things must be _____ again and again.”．
A. spoken B. repeated C. described D. introduced
5. —Have you ever heard of Langlang
—Sure. He is one of ______ pianists ______ I have even seen.
A. good; that B. much better; who C. the best; which D. the best; that
D
B
D
知识梳理
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（整体中除去细节）
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
有关DNA的知识
DNA is the blueprint of life.
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.
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
related 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
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.
Talk about:
Something you know about changing DNA.
Do you think DNA can be changed
Do you know to change
...
4. Is it a good idea to change the DNA of the food we eat Some people say doing this makes our food better. Others think it’s too dangerous. Search the Internet for information and write down your ideas.
活动小结
DNA就如建造房子的蓝图一样， 控制着身体的构成。
当堂检测
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
二、根据汉语意思完成句子
1.他和我家有亲戚关系。
He _______ ________ ________ my family.
2.凯特和她姐姐有同样颜色的头发。
Kate has ________ ________colour of hair________her sister.
3.数十亿年前，地球只是一团尘埃。
________ ____ years ago, the earth was just a cloud of dust.
4.他的话对她有很大影响。
She was ________ ___________ by his words.
5.李明不仅聪明而且勤奋。
Li Ming is_____ ______ _______ ______ _____ ______________．
the same
as
is related to
strongly influenced
Billions of
not only clever but also hard working
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.
3.了解更多关于自然、DNA的事实