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In this question, we are asked to describe what epigenetic changes are and what are the causes that make them appear.
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So generally, epigenetics as a whole refers to the inheritance of variation outside of differences in the dna sequence.
00:18
Thus, it encompasses phenotypes and processes transfer to other cells or generations.
00:24
Epigenetic traits can be defined as stable and inherited phenotypes caused by chromatin changes.
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However, with no changes to the dna sequence.
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These changes are deemed stable and heritable as they are transmitted from one cell to the next.
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One example of epigenetic changes is found in female mammals when one of the x chromosomes is inactivated.
00:50
In terms of epigenetic changes themselves, these are related to chemical modifications of chromatin structure by histone proteins, in particular since changes in chromatin structure can be conserved in cell division, they are passed down to future, through generations of cells or even organisms...