<h2>Definition : Heritable changes in gene activity and expression that occur without alteration in DNA sequence</h2>

<h2>Two well-known epigenetic modifications</h2>

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<h2>Why is it important ? &gt;&gt;&gt; Epigenetic&nbsp; modifications regulate gene activity and expression during development and differentiation, or in response to environmental stimuli</h2>

<h2>Epigenetics is considered a bridge between genotype and phenotype</h2>

<h2>Explain how cells carrying identical DNA differentiate into different cell types &gt;&gt;&gt; Epigenetics</h2>

<h2>Epigenome - global analyses of epigenetic markers across the entire genome</h2>

<h2>Chromatin - Histone protein / DNA complex&nbsp;in eukaryotic cells</h2>