WEBChapter 1: Why study chromosomes? 1. 1.1 Early studies of chromosomes, 1. 1.2 The origin of genetics, and the chromosome theory of inheritance, 1. 1.3 The chemical nature of genes and chromosomes, 2. 1.4 The position of chromosomes in an age of molecular biology, 3 Website, 4. Chapter 2: Mitosis, meiosis and the cell cycle, 5.