Dolly and its creator

Unit 2 CloningUnit 2 Cloning

The advanced technique in genetics

( 遗传学 ) with which scientists can

create or copy things with the same

DNA.

What is a clone?

Warming Up

Clone?

Natural clone

Man-made clone

Natural clone is one that occurs from the “parent ” in a natural form of cloning without human help.

Man-made clone is one produced through human intervention( 介入 ) .

Judge which is which? --- 4 pictures on P10

Scientific DefinitionScientific Definition

Cloning is the creation of cells or whole

animals by using DNA from a single

“parent”, not with the normal reproductive

process. The clone has the same DNA to

the “parent”.

How is a mammal clone produced? [P11]

What benefits can humans gain from cloning?

Medical cloning could produce cures for serious illnesses in humans.

Cloning plants can produce

plants of similar quality for sale.

Cloning plants can be useful for research on new plant species.

Cloning can help save endangered animals.

What problems may arise when humans are cloned?

Animal clones may develop the illnesses of older animals.Animal clones may die younger than the donor( 供体 ) animals.

Evil leaders may want to clone themselves to attain their ambitions.

There are moral objections to cloning human beings.

Oh! My God! I was cloned!

Is it good to clone humans?

1. 朗读 ReadingI 五次以上 , 思考作者立场，

并记背黑体词和学案短语；2. 完成学案一之 Part One ( 语法填空 ) ；3. 百思要点讲练 P20-22 。* 部分同学今天内上交作文积累本； 部分同学今天中午背默范文 【见张贴】

Homework

Reading I

1. What kind of writing does the article belong to ?

A. Expositive( 说明性的 )

B. Argumentative( 议论性的 )

C. Narrative ( 叙事性 )

2. What is the writer’s attitude?

A. Neutral( 中立的 ) B. Negative( 否定的 )

C. Positive( 积极的 ) D. Indifferent( 冷淡的 )

A

[P12/3] A

Main idea of each paragraph: topic sentence & key words

1. __________ of cloning

2. _______________ of cloning

3. _________ of the first mammal clone

4. _____________ of cloning in society

5. __________________ towards cloning

Definitions

Problems

Two major uses

Impact(effect)

Reactions(attitudes)

Summary writing:• The passage introduces cloning and the s

uccess of first mammal clone, Dolly the s

heep. It also tells us about the impact/eff

ect caused by Dolly and the diverse publi

c reactions/attitudes to human cloning.

<32w>

1. 继续熟读 ReadingI, 记背其中的黑体词 和圏划的学案短语； [ 选做 P13-exx]

2. 百思要点讲练 P23-25 ；3. 五三阅读： Unit25/ (1)+2.

* 今天中午继续背默范文 【名单见张贴】** Robot Project 组长继续补充及按要求 编辑作品并替换原文档。

Homework

Unit 2 Cloning

1996 Dolly the sheep

第一只克隆宠物猫 cloned rabbit

克隆的荧光小猪 ( 左 )和正常小猪 ( 右 )

克隆马及其“ 母亲兼姐姐”

Reading II

The return of Dinosaurs?

1.What kind of writing does the article belong to ?

A. Expositive / exposition ( 说明文 )

B. Argumentative / argumentary ( 议论文 )

2. What is the writer’s attitude?

A. Neutral ( 中立 ) B. Opposition ( 反对 )

C. Approval ( 赞同 ) D. Indifference ( 冷淡 )

Find out sentences that show the writer's attitude:

* But in fact we are a long way from being able to clone extinct animals.

* Unfortunately, with what we know now, this is either impossible or unsuitable.

* Based on what we know now, you cannot clone animals that have been extinct longer than 10,000 years.

* * So the chance of dinosaurs ever returning to the earth is merely a dream.

1. 熟读 ReadingII, 记背其中的黑体词 和圏划的学案短语；2. 百思语法讲练 P26-28 ；3. 完成学案之“仿写句”学与练。* 今天下午第七节开始全级进行英语测试（市部分学校 M7 摸底考），请后十五个 学号的同学眼操后带备文具前往长风楼 一楼会议室参加考试，其余同学留在课室 进行。

Homework