Unit 2@ gene and clone.docVIP

Unit 2 Gene and Clone Goals: What You Should Learn to Do 1. Understand what your body is made up of , gene and clone 2. Professional words and expression. 3. Know the structure of DNA (RNA) 4. Talk about or comment on the future of clone and use 5. Write a short essay Teaching process warm-up@Spoken English practice (1) What is your body made up? (2) what is clone? Do you give further explanation? 2. Workplace English 3. New words and expression. 4. Explain the passage and passage sentence by sentence. Passage I Knowing our body and DNA 1. What is your body made up of ? (1) cell You are made up of billions of cells. Current estimates put the figure somewhere between 10 billion and 100 billion cells. Inside nearly every cell is a nucleus containing your own unique set of 46 chromosomes, each of these chromosomes consists of deoxyribonucleic acid (DNA). (2) What is chromosome made of ? Deoxyribonucleic acid is a very important molecule found in all living cells. It contains information used in everyday metabolism and growth and influences most of our characteristics. DNA is often described as the blueprint of an organism. It enables various cells to develop and work together to form a fully functional body, and controls characteristics such as eye color. How much DNA influences very complex features, such as intelligence, is not yet fully understood. Half of your DNA comes from your mum and half from your dad. When the sperm and egg combined to make you, 23 chromosomes from the egg combined with 23 chromosomes from the sperm to form a full complement of human DNA - 46 chromosomes. DNA looks like an incredibly long twisted ladder. This shape is called a double Helix (3) What is a gene? The DNA double helix stores information in the form of a genetic code. Sections of DNA that contain complete messages are known as genes. They can be thought of as words along the DNA sentences. Genes are messages that provide the information for all cellular function