成都信息工程大学（成都信工学院）：《大学英语》PPT教学课件（第三册）Unit 8 Cloning

T UNIT 8 Cloning NTextA A Clone is born

UNIT 8 Cloning Text A A Clone is Born

Objectives Students will be able to 1. understand the main idea(cloning is a two-edged sword) and structure of the text 2. appreciate the writing strategies employed by the author 3. master the key language points and grammatical structures in the text 4. conduct a series of reading, listening, speaking and writing activities related to the theme of the unit

Objectives : Students will be able to: 1. understand the main idea (cloning is a two-edged sword) and structure of the text; 2. appreciate the writing strategies employed by the author, 3. master the key language points and grammatical structures in the text; 4. conduct a series of reading, listening, speaking and writing activities related to the theme of the unit

Background .o clone: a group of organisms or cells that are genetically identical, having been produced from one parent by asexual reproduction. The individual organisms or cells are precise copies of the parent and genetically identical to it. Clones are found naturally among single-celled organisms(such as bacteria), a few invertebrates(such as corals), and some asexually reproducing plants(as in the production of runners by a strawberry plant)

Background : ❖ clone: a group of organisms or cells that are genetically identical, having been produced from one parent by asexual reproduction. The individual organisms or cells are precise copies of the parent and genetically identical to it. Clones are found naturally among single-celled organisms (such as bacteria), a few invertebrates (such as corals), and some asexually reproducing plants (as in the production of runners by a strawberry plant)

In agriculture, plant cloning can be used to advantage, in that individuals with desirable properties, such as pest-resistance or high growth rates, can be replicated exactly without the unpredictable results associated with sexual reproduction. Artificial cloning of animals and cells can be achieved by teasing apart the cells of the early embryo. Similarly, cells capable of growing into mature plants can be obtained from plant growth-regions(meristems) In genetic engineering cloning refers to the copying of DNA molecules

In agriculture, plant cloning can be used to advantage, in that individuals with desirable properties, such as pest-resistance or high growth rates, can be replicated exactly without the unpredictable results associated with sexual reproduction. Artificial cloning of animals and cells can be achieved by teasing apart the cells of the early embryo. Similarly, cells capable of growing into mature plants can be obtained from plant growth-regions (meristems). In genetic engineering cloning refers to the copying of DNA molecules

.o genetic engineering: the deliberate modification of the genetic make-up (genome) of an organism by manipulation of its DNA Genetic engineering techniques include cell fusion and the use of recombinant dNA (rDNA). Since the late 1960s these techniques have held out the most exciting promise for biotechnology

❖ genetic engineering: the deliberate modification of the genetic make-up (genome) of an organism by manipulation of its DNA. Genetic engineering techniques include cell fusion and the use of recombinant DNA (rDNA). Since the late 1960s these techniques have held out the most exciting promise for biotechnology

n such a new field controversy inevitably abounds. Worries concerning release of genetically novel bacteria into the environment, or the possible manipulation of human embryos, have led to the setting up in the USA of the Genetic Manipulation Advisory Group(GAMA), Legislation governing genetic research has also been passed in several other countries

In such a new field controversy inevitably abounds. Worries concerning release of genetically novel bacteria into the environment, or the possible manipulation of human embryos, have led to the setting up in the USA of the Genetic Manipulation Advisory Group (GAMA), Legislation governing genetic research has also been passed in several other countries

Text structure 8. Paras 1-2 Dolly the sheep, a clone, was born Paras 3-6 Dolly's birth has made cloning a reality and human cloning a possibility ☆ Paras7-11 People have to face the ethical problems of human cloning .o Paras 12-16 Cloning technology could benefit people in more than one way

Text Structure : ❖ Paras 1-2 Dolly the sheep, a clone, was born. ❖ Paras 3-6 Dolly’s birth has made cloning a reality and human cloning a possibility. ❖ Paras 7-11 People have to face the ethical problems of human cloning. ❖ Paras 12-16 Cloning technology could benefit people in more than one way

give birth to 1). bear(a child), bring forth e.g. Although a mother panda often gives birth to two cubs she usually abandons one of them without attempting to care for it The research has shown that mothers who smoke give birth more frequently to premature or underweight babies 2). create, originate e.g. The extraordinary experience gave birth to his latest novel Einstein gave birth to a whole new way of looking at matter and energy

give birth to 1). bear (a child), bring forth e.g. Although a mother panda often gives birth to two cubs, she usually abandons one of them without attempting to care for it. The research has shown that mothers who smoke give birth more frequently to premature or underweight babies. 2). create, originate e.g. The extraordinary experience gave birth to his latest novel. Einstein gave birth to a whole new way of looking at matter and energy

for all the world in every respect: exactly e.g. I felt for all the world as if I was still a child He looked for all the world like a country doctor

for all the world → in every respect; exactly e.g. I felt for all the world as if I was still a child. He looked for all the world like a country doctor

dot 1). Spread things or people In various separate places over an area e.g. From the top floor we could see the trees dotting the landscape The sky was dotted with stars 2).n. a small round mark e.g. He forgot the dot on the letter i and so it looked like an 1 The stars just look like thousands of tiny dots of light

dot 1). Spread things or people in various separate places over an area e.g. From the top floor we could see the trees dotting the landscape. The sky was dotted with stars. 2). n. a small round mark e.g. He forgot the dot on the letter i and so it looked like an 1. The stars just look like thousands of tiny dots of light