But what all cancers have in common is that they start off as rebel cells, mutant cells, which defy the normal regulations that govern cell behaviour. Together, we will explore some of the fundamental differences that dictate behaviour in normal cells, as well as in cancer cells. What understanding the genetics of cancer enables us researchers to do is rationalise our treatment. And together, we will explore in this course what are the key issues that drive cancer research here at Bath. Ultimately, this course is a beginner's guide to show you how genetics can influence cell behaviour to make them cancerous.