Use your class notes (not the internet) for this question.

A. Think of one example from a lecture or another paper we discussed in part III of class where the same epigenetic regulatory pathway played a role (e.g., X inactivation, addiction, metabolism and diet, learning and memory, etc.). Briefly describe that example.

B. Compare your chosen exam article to that class example by answering:

• One similarity is in how epigenetic marks affect gene expression.
• One difference in either the type of epigenetic mark, or the biological process being regulated (development, disease, plasticity, etc.).