资源简介

(共17张PPT)
Unit 9 Human Biology
Lesson 1
To clone or not to clone
教材分析
本单元第一课是一篇介绍克隆的文章。从人工克隆羊多莉到克隆猴“中中”和“华华”说起，陈述人工克隆技术的潜在意义和所遭受的舆论质疑。最后得出结论不能因工具被人误用就否认工具本身的价值。
教学目标
在本课学习结束时，学生能够：
1. 获取文章主旨大意；
2. 理解人工克隆技术潜在的意义和所遭受的质疑；
3. 反思人类使用工具的方法，拒绝滥用工具。
教学重难点
【教学重点】
1. 获取文章主旨大意；
2. 理解人工克隆技术潜在的意义和所遭受的质疑。
【教学难点】
反思人类使用工具的方法，拒绝滥用工具。
Step 1 Lead-inWhat do you know about cloning What additional information would you like to know Use the words and phrases to help you.设计意图：创设情境，引入主题，激活学生已有语言和知识，为阅读做好准备。Step 2 Reading1. Read through the article. Draw a structural map to show how the paragraphs are organised.2. Read paragraphs 1-4 and make detailed notes about cloning that better illustrate the information. Then share your notes in a small group.3. Read the first four paragraphs again. Ask and answer the questions in pairs based on your notes.4. Read paragraphs 5-6 and complete the notes.5. Read the last paragraph. What does Einstein’s quote mean 6. Talk about cloning using the information in the article.7. Think and share.(1) Why do researchers insist that the science of cloning should be further explored and advanced (2) What is the writer’s attitude towards cloning Find evidence.8. Read the first sentence of each paragraph. Are there any signal words, such as linking words or time expressions that help to make the article coherent 设计意图：先阅读文本，获取梳理文本基本信息。之后引导学生深化理解文章细节，解析语篇用词，理解作者深意。Step 3 PracticeComplete the summary using the information in the article.设计意图：通过完成课文语法填空，巩固对语篇的理解以及单词识记。Step 4 Assignment1. Search online and find more information about the development of cloning. Share the information in class.2. Do you think cloning is a good idea Use what you have learnt to try to persuade someone to accept your point of view.设计意图：搜寻更多有关克隆的信息，表达对克隆的看法。
Watch the video and answer the following questions.
Do you want to be cloned Why or why not
What do you know about cloning
How does Dolly differ from other sheep
克隆（Clone）是指生物体通过体细胞进行的无性繁殖，以及由无性繁殖形成的基因型完全相同的后代个体组成的种群。通常是利用生物技术由无性生殖产生与原个体基因完全相同的个体或种群。
Lead-in
克隆羊多莉（Dolly），于1996年7月5日诞生于英国爱丁堡市罗斯林研究所，是一只通过现代工程创造出来的雌性绵羊，也是世界上第一个成功克隆的人造动物。
Reading
WHAT
本文话题为“克隆还是不克隆”；
本文介绍了克隆科学的概念，并举例说明了第一只成功克隆的动物多莉和中国科学家首次成功克隆的灵长类动物。此外，克隆科学的探索与发展仍然是一个具有争议的话题，它既可能为医学研究和人类健康发展做贡献也可能引起人们有关道德方面的担忧。
语篇研读——To clone or not to clone
WHY
本文通过介绍克隆科学的概念、成功案例，以及关于克隆科学潜在的利弊，引导学生初步了解一些有关生命科学方面的知识，同时也能用辩证性思维深入思考是否需要发展克隆科学。
语篇研读——To clone or not to clone
Successful examples
To Clone or not to Clone
Definition
Text builder—To Clone or not to Clone
Opinions
Cloning
1. makes an ____________ a plant or animal
2. develops it naturally or ________ Natural cloning
● It has taken place for generations.
● Two examples:
1. Gardeners take a cutting from a plant and place it in a medium.
2. _____________ are produced from the same egg.
First cloning and first-cloned primates
exact copy of
artificially
Identical twins
Dolly developed an illness later and lived for six and a half years.
Dolly was the ______ mammal to be cloned artificially.
First cloning
Since Dolly, more than 20 mammal ______ have been cloned.
Successful examples
Text builder—To Clone or not to Clone
These cloned animals had ______________________ _________with Dolly.
species
first
a similar pattern of health
problems
Scientists have had to work hard to break the ______________ to get primate with edited genes.
In 2018, China announced that two ________ had been cloned.
First-cloned primates
The breakthrough may be helpful for_________
_______________________.
Text builder—To Clone or not to Clone
monkeys
technical barriers
medical
Successful examples
research and human health
Successful examples
To Clone or not to Clone
Definition
Text builder—To Clone or not to Clone
Opinions
Potential benefits
1. lead to _________ various diseases
2. prevent the aging process and save research time
3. reduce the number of animals being tested on
4. produce more accurate results and lead to more _________________
Moral concerns
Some people worry about the ______________. The technology might be ______ by some organisations.
Writer’s attitude
Cloning can be a helpful tool in medical research but that it can also become dangerous.
cures for
effective treatments
ethical questions
abused
Read the first four paragraphs again. Ask and answer the questions in pairs based on your notes.
What is cloning
Cloning is the process of making an exact copy of a plant or animal and developing
it either naturally or artificially.
(2) What examples of natural cloning are given
An example of natural cloning is taking a cutting from a plant and putting it in soil,
and another is identical twins.
(3) What was the first cloned mammal What happened to her
The first successfully cloned mammal was a sheep named Dolly. She developed an
illness that is more normally found in much older animals and lived for six and a
half years.
Reading
(4) How has the science of cloning developed since the first cloned mammal
Scientists have been able to clone animals of other species.
(5) What development in cloning was announced in 2018 What was special about it
The first two long-tailed monkeys were cloned. Cloning a primate is more difficult
than cloning other animals.
(6) For how long did Dr. Sun Qiang’s team work Why did they work so hard
More than 5 years. To get animals with edited genes and produce animal models
that are helpful for medical research and human health.
Reading
Complete the summary using the information in the article.
Natural cloning has taken place for generations. An example of this is identical 1 _______. A sheep called Dolly was the first mammal to be cloned 2 __________. Since Dolly, more than 20 mammal 3 _________ have been cloned including camels and goats. In 2018, China announced that two monkeys had been cloned. In comparison with other species, scientists have had to work hard to break the technical 4 ________ to get primates with 5 _________ genes.
Practice
twins
artificially
species
barriers
edited
Scientists say that this major breakthrough offers the 6 _________ to create monkeys with 7 ________ genes to give more 8 _________ research results and perhaps lead to 9 ________ for various diseases. Whilst scientists insist it is 10 ________ to continue research, others raise 11 _________ concerns and worry that the technology might be 12 __________ by some organisations.
Practice
potential
identical
accurate
cures
crucial
moral
abused
Thank You !

展开更多......

收起↑