PowerPoint for OCR 21st C B1 lesson 1. PowerPoint includes lesson plan and card sort activity. Covers spec points: B1.1. 1. recall that instructions to control how an organism develops and functions are found in the nucleus of its cells and are called genes 5. understand that some characteristics are determined by genes (eg dimples), some are determined by environmental factors (eg scars), and some are determined by a combination of genes and the environment (eg weight) 6. understand that many characteristics are determined by several genes working together (eg eye colour).