Unit7 问题.docVIP

Questions about the background knowledge: What is genetics? What do you know about genetics？ Genetics is the study of heredity. Heredity is a biological process where a parent passes certain genes onto their children or offspring. Every child inherits genes from both of their biological parents and these genes in turn express specific traits. Some of these traits may be physical for example hair and eye color and skin color etc. On the other hand some genes may also carry the risk of certain diseases and disorders that may pass on from parents to their offspring. What is gene? How much do you know about genes? A gene is the basic physical and functional unit of heredity. Genes, which are made up of DNA, act as instructions to make molecules called proteins. Every person has two copies of each gene, one inherited from each parent. Most genes are the same in all people, but a small number of genes (less than 1 percent of the total) are slightly different between people. Alleles are forms of the same gene with small differences in their sequence of DNA bases. These small differences contribute to each person’s unique physical features. What is DNA? What do you know about DNA? DNA is Deoxyribonucleic acid. This contains all the genetic instructions for development. RNA is Ribonucleic acid. RNA is single strand where as DNA is double strand. You can find more information here What is the Value of Research into Human Genetics? Find out the riddle of our lives Figure out how many genes we have Find out the cause of many inherited diseases Figure out a way to fix defective genes Understand how DNA and proteins work Have a clearer idea of how we are related to the other life forms with which we share our planet Questions about the passage of Section A: Fast Reading Questions What is The History and Geography of Human Genes? The History and Geography of Human Genes is a remarkable collection of more than 50 years of research in population genetics. 2.What kind of book