Inheritance — AQA GCSE Combined Science Synergy

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1. This topic builds on the study of cells in Cells in animals and plants (page 27) to explore the relationships from the molecular level upwards between genes, chromosomes and phenotypic features. Content covered includes sex determination in humans and single gene inheritance of particular characteristics. Included is the understanding that most phenotypic features are the result of multiple genes rather than single gene inheritance. The ideas presented here lead on to the study of mutations, selective breeding and genetic engineering in Variation and evolution (page 82).