Transcript 幻灯片1

外研版
高二年级(选修6)
Module 5
Vocabulary & reading
Cloning and DNA
Work in pairs. Look at the title of the
passage and the words in the box. Decide
which ones you’re likely to see.
acid bacteria embryos enzyme
experience gene human tissue organism
plant psychological stem cell structure
upbringing
Scannig:
Work in pairs and answer the questions.
What is___?
1. DNA
the fundamental component of life
2. a clone
an organism which is genetically
identical to another
3. a stem cell
a cell that can develop into every
other type of cell
4. the genetic make-up of a person or a
plant
the particular genes that give a person
their physical characteristics
5. bacteria
very small organisms that cause
diseases
6. an enzyme
chemicals formed in the body
Into the text:
Read the passage again and find the
paragraphs which describe:
a. When the structure of DNA was
discovered
Paragraph 1(1953)
b. How to clone something
Paragraphs 2,3(take the DNA from a
single cell to create another identical
individual)
c. four possible reasons for cloning
Paragraphs 4(as an alternative
treatment for couples who find it
difficult to have children), 5(to
reproduce the talents of exceptional
people), 6(to obtain a supply of stem
cells), 7(to help farmers grow resistant
crops)
d. the disadvantages of cloning
Paragraphs 4(a clone would be under
unknown psychological pressure), 5(a
clone may possess new vices instead of
existing virtues), 6(embryos made form
clones would be wasted which some
people would find unacceptable), 7(to
rely on a few cloned animals or crops
would restrict biodiversity)
Read the text again and decide whether
the following statements are true (T) or
false (F).
1. The science of genetics was discovered
by two scientists, Watson and Crick at
Cambridge University. ( F)
2. Stem cells in embryos can help
someone recover from a disease, repair
human tissue and so on. ( T )
3. The child who was a clone of one of
his parents would have
psychological
pressure throughout his childhood.
(T )
Words revision:
According to the definition, find the
proper words.
1. thin enough to be seen through
transparent
2. A pattern of chemicals within the cell
of a living thing that controls what it
is like
gene
3. The same or exactly alike identical
4. Be likely to cause argument or
disagreement controversial
5. Can be chosen freely optional
6. Bad habit or personal quality vice
7. Can change or be changed to adapt to
new needs flexible
8. Put into force by orders or by the
law compulsory
9. Useful or simple to use
handy
10. The natural watery liquid produced
in the mouth saliva
Key sentences:
1. It’s certainly true that in 1953, two
scientists discovered the structure of
the acid DNA.
2. It was in 1866 that Mendel first
recorded the results of growing pea
plants.
3. He discovered a procedure to use
enzymes to unzip the DNA and cut
out a sequence of genes.
4. A clone is an organism which is
genetically identical to another one.
5. A prize cow which resist bacteria or
disease, or to sow a cloned crop
which can resist rot or pests.
6. To rely on a few cloned animals or
crops would restrict the biodiversity
of the breed.
Language points:
1. A clone is an organism which is
genetically identical to another one.
1) 同一的；同样的
We are identical in our views of what
should be done.
我们双方对应当怎么办的看法是一致的。
This is the identical hotel that we
stayed in last year.
这就是我们去年住过的那家旅馆。
2) (常与with连用) 完全相同的
These two designs are almost
identical.
这两种式样几乎完全相同。
My opinion is identical with his.
我的意见和他的意见相同。
identify v.
identify sb / sth as sb / sth
identify sth with sth 认为某事物与某事
物等同
She identified the man as her brother.
她把那个男人认成了他的兄弟。
One can’t identify happiness with
wealth.
幸福和财富不能混为一谈。
2. A prize cow which resist bacteria or
disease, or to sow a cloned crop which
can resist rot or pests.
1). 意为“抵抗；反抗；”。如：
The rebel army resisted the police.
叛军与警察对抗。
The laborers prepared to resist and to
overthrow this Government.
劳动人民准备反抗推翻这个政府。
2). 意为“抵御；阻止；抗；耐”。如：
For months the company has resisted
changing its accounts system.
数月以来，这家公司阻止改变它的帐
目。
This metal resists rust.
这种金属是防锈的。
3). 意为“经得住；不屈从”, 常用于否
定句。如：
Jill couldn’t resist making jokes
about his boldness.
吉尔忍不住拿他的秃顶开玩笑。
She couldn’t resist sweets.
她看到甜食就想吃。
[词汇拓展]
resistance n. （不可数）抵抗，对
抗；反对, 抵抗力, 阻力 (与to连用)
resistant adj. 抵抗的，有抵抗力的
The demonstrators offered little or no
resistance to the police.
示威群众对警方没怎么抵抗。
Rebel gunmen have put an end to
armed resistance.
叛军停止武装抵抗。
The firm has to overcome its resistance
to new technology.
这家公司必须克服对采用新技术的阻力。
A healthy person offers more resistance
to disease than a weak person.
身体健康的人对疾病的抵抗力比身体弱
的人强。
The seedlings are resistant to cold
weather.
这些秧苗有抗寒力。
随堂练习
根据下列各句句意及所给单词的首字母提
示，写出该单词的正确形式。
1. The two words are i_______
dentical in meaning.
That is, you can use one in place of the
other.
2. This is an o______
riginal painting by Picasso,
not a copy one.
3. They lost their home and all their
p_________
ossessions in the storm.
4. They have o______
btained one million dollars
from the government. Their next step is
to find a business partner.
5. This is a box with f______
lexible height and
width. It can expand to contain as much
as five kilos.
6. Thanks to the doctor’s timely treatment,
he r________
ecovered his health soon.
7. Membership of the club is r________
estricted to
men only. Women are not allowed in.
8. C___________
ompulsory education is education
provided by governments, which
children are required by law to receive.
9. The box has a t__________
ransparent plastic lid
so you can see what’s inside.
10. The first step in the p________
rocedure for
making a kite is to build a frame.