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EnglandBiologyQuick questions
Topic 3: The voice of the genome
Quick questions on Gene expression and epigenetics: transcription factors and methylation - Edexcel A-Level Biology B
2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is q1?Show answer
Explain how DNA methylation can switch a gene off. [2 marks]
What is q2?Show answer
Explain how the environment can affect the phenotype without changing the DNA sequence. [2 marks]
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