Question: A gene, which we will call gene C, can be epigenetically modified in such a way that its expression in some cells is permanently silenced.

A gene, which we will call gene C, can be epigenetically modified in such a way that its expression in some cells is permanently silenced. Describe how you could conduct cell fusion experiments to determine if a cis- or trans-epigenetic mechanism is responsible for maintaining the silencing of gene C.

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