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