Google's Ngrams viewer yields some interesting results when you query the mentions of various fields within genetics over the past century or so. Nothing too surprising, though I would have thought that molecular genetics would have surpassed population genetics even earlier than it did.
Note that the default settings go to 2000. But I was curious about genomics' trajectory, and I pushed it to the max (2008). The qualitative result was not a surprise to me, but the magnitude did take me aback: