Unit 5 Lesson 29 DNA—The Story of You 课件(共17张PPT)

(共17张PPT)
Unit 5
Lesson 29
DNA—The Story of You
新
课
导
入
The magic of DNA.
Language Goal
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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!
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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.
新知学习
课堂小结
当堂检测
学习目标
重点研讨
·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!
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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.
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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
新知学习
课堂小结
当堂检测
学习目标
重点研讨
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.
重点研讨
课堂小结
当堂检测
学习目标
新知学习
1.Are there differences between you and them 你和他们之间有什么不同吗
【辨析】between与among
between常用于两者之间，among一般指三者或三者以上。
Jack sits between Lin Tao and Bob.
I was among the crowd. 我处在人群中。
重点研讨
课堂小结
当堂检测
学习目标
新知学习
2.You use it to build a house.你用它来建造房子。
use的用法 use…to do sth. 用……做某事
He is using a knife to cut bread. 他正用小刀切面包。
【注意】 use的形容词是useful，它是由use加后缀-ful构成的。如：
Is the fridge very useful 这台冰箱很有用吗？
重点研讨
课堂小结
当堂检测
学习目标
新知学习
3.DNA is a pattern, too. DNA也是一种模型。
too表示“也”时,通常置于句末，其前用逗号隔开。
【辨析】too与either
too与either都表示“也”，其区别是too用于肯定句，表示“也”；either用于否定句，表示“也不”。他们通常都位于句末，其前用逗号隔开。如：
He has a sister, too. 他也有个小妹妹。
He doesn’t have a knife, either. 他也没有小刀。
重点研讨
课堂小结
当堂检测
学习目标
新知学习
4. Except for identical twins, each living thing has its own unique DNA.
除了同卵双胞胎之外，每个生物都有它唯一的DNA。
1)except for除……以外，只是
He is a good man except for hot temper.
除了脾气暴躁外，他是个好人。
2)own的用法adj. 自己的（用在所有格后面，加强语气） She makes all her own clothes.
她所有的衣服都是自己做的。
vt. 有；拥有
Who owns the bike
这辆自行车是谁的？
owner n. 所有人；物主
He is the owner of the house.
他是这座房子的主人。
重点研讨
课堂小结
当堂检测
学习目标
新知学习
课堂小结
重点研讨
当堂检测
学习目标
新知学习
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
当堂检测
重点研讨
课堂小结
学习目标
新知学习
Ⅰ.Fill in each blank with the proper word.
1. ______(介词)general, he is never late for school.
2. Your brothers are people _________(relate) to you.
3. Do you know who is the _________(own) of the house
4. Your body uses this pattern _________ (build) itself.
5. You have your own DNA, but it repeats the patterns from your __________(parent) DNA.
6. Some health problems come from your family’s DNA._________(science) can look for these problems in your DNA.
In
related
owner
parents’
Scientists
to build
当堂检测
重点研讨
课堂小结
学习目标
新知学习
二、根据汉语意思完成句子，每空一词：
1. 我们用蓝图建造房子。
We _______ a blueprint ______ _______ a house.
2. 除了窗子小外,这座房子很漂亮。
The house is beautiful ______ _____ the small windows.
3. 你的头发和皮肤有同样的DNA。
Your hair has ______ _______ _______ _____ your skin.
4. 她不但会唱歌，而且会跳舞。
She can _____ ______ sing ______ ________ dance.
use
to build
except for
the same DNA as
not only
but also