In depth Cornell notes on Topic 7 of AQA Biology, covering inheritance and populations in ecosystems. Covers all of the topic including dihybrid crosses, epistasis and pedigree analysis. Includes the Chi-squared test and the Hardy-Weinburg principle. Also covers sampling with quadrats and Mark-Release-Recapture as well as primary succession, secondary succession, allopatric speciation, and sympatric speciation. These notes have ensured that I work at an A/A* grade