AQA 7402 Section 3.8 — transcription factors and gene regulation, epigenetics, stem cells and differentiation, oncogenes / tumour suppressors / cancer, recombinant DNA technology, PCR and gel electrophoresis, genetic fingerprinting and forensics, gene therapy and genome projects. Source migrations: dna-gene-expression-depth L5-L9 (epigenetics + biotech lessons) plus cells-transport-depth L8 (stem cells) — moved here because totipotency and pluripotency are conceptually a gene-expression-control topic.
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