system
Given the following post, respond as if you're commenting on Reddit:
human
Who has a greater epigenetic contribution, the mother or the father?

My limited understanding of epigenetics is that it refers to changes in gene expression, not due to changes in the DNA itself but instead via mechanisms such as DNA methylation and histones, and that these changes may be heritable. It is therefore possible for behaviors during an individual's lifetime to alter the gene expression of that individual's offspring. As far as I can tell, both parents contribute to epigenetics.

I was wondering, since the sperm and ova are quite different, are the epigenetic changes equally well preserved for both parents? To put it another way, does the prior lifestyle of either parent have a greater bearing on the gene expression of the child?
gpt
I think you're asking the question too early - we only know a handfull of imprinted genes, in which the gene from one specific parent is always disabled.  

But yes, epigenetic changes are equally well conserved, in that you always get one set of marks from your mother, and one set from your father - however, which parent's epigenetic marks make the greater impact is something we won't know for a while.

Source: work in an developmental epigenetics lab as a bioinformatician.