Chapter 2 
Page 
The Origins of Genetics 29 
Genetics in the 20th Century 33 
The Riddle of the Gene 33 
The Genetic Code 37 
Developing Genetic Technologies 39 
The Basic Issues ' 43 
How Will Applied Genetics Be Used? 43 
What Are the Dangers? 43 
Figures 
Figure No. Page 
5. The Inheritance Pattern of Pea Color 30 
6. Chromosomes 32 
7. The Griffith Experiment 34 
8. The Structure of DNA 36 
9. Replication of DNA 37 
10. The Genetic Code 38 
11. The Expression of Genetic Information in 
the Cell 39 
12. Transduction; The Transfer of Genetic 
Material in Bacteria by Means of Viruses .... 39 
13. Conjugation: The Transfer of Genetic 
Material in Bacteria by Mating 40 
14. Recombinant DNA: The Technique of 
Recombining Genes From One Species With 
Those From Another 41 
15. An Example of How the Recombinant DNA 
Technique May Be Used To Insert New 
Genes Into Bacterial Cells 42 
