Genetics, populations, evolution and ecosystems (A-level only)

    AQA
    A-Level

    This topic integrates the study of genetic inheritance with ecological interactions to explain how populations change over time. It covers the mechanisms of transmission genetics, including sex-linkage and epistasis, and applies mathematical models like the Hardy-Weinberg principle to allele frequencies. The content extends to ecosystem dynamics, analyzing energy flow, nutrient cycling (nitrogen and phosphorus), and the processes of succession and speciation driven by natural selection.

    2
    Objectives
    0
    Exam Tips
    0
    Pitfalls
    7
    Key Terms
    0
    Mark Points

    Learning Objectives

    What you need to know and understand

    • Genotype, phenotype and genetic crosses.
    • Hardy-Weinberg principle and population calculations.

    Key Terminology

    Essential terms to know

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