| Front | What is epigenetics and define the epigenome |
|---|---|
| Back | The modification of the expression of DNA through the addition of epigenetic markers (chemical markers that control the expression of genes) using two mechanisms (histone modification uses histone tails to determine how tightly the DNA is wound around the histone proteins as it needs to be loosely wound so it can be uncoiled from the protein for RNA polymerase to attach to it; DNA methylation adds a methyl group CH3 to a nitrogenous base - often cytosine - to prevent transcription and turn the gene off) Epigenome is the organisation of epigenetic markers in a cell that affects the cells gene expression and behaviour (environmental factors can affect this) |
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