Problem 1: What did Thomas Hunt Morgan contribute to the field of genetics?
Problem 2: How were studies in fruit flies able to discover that genes were actually molecules (i.e. chemicals)?
Problem 3: Explain the 'one gene one enzyme' hypothesis, including who proposed it and what discoveries shaped it.
Problem 4: Why did the model of DNA proposed by Watson and Crick 'immediately suggest a possible copying mechanism'?
Problem 5: What is the 'central dogma' of modern biology?