Hi there guys,
Interesting one this, a friend of mine was involved in a study into this area a while back at a well known hospital in the UK. From what I can remember, and also why the way you worded your post is quite interesting is that they identified two groups ... those that suffer from snoring in general (which has a few variable factors that are the fault of genes, e.g short jaw) and also those that suffer from obstructive sleep apnoea (OSA). The latter is much more serious, the main points of the problem are droziness during the day and the ability to instantly ... no matter where you appear to be or what actions your performing, fall asleep. Obviously people with this disorder vary in just how bad they have it - some can just fall asleep when their head hits the pillow and some have the full blown varient. As you can imagine, most don't even know they have it as they see the lesser varients as 'normal'. A friend and his co-workers were trying to pinpoint the gene / base mutation to which causes it ... I haven't seen him in a good 3 years now as he's working overseas but as far as I know, they never did actually pinpoint it. The study involved something like 8 - 10 families, some with OSA, so it wasn't a big investigation. However, stats back then showed around 24% of people in the UK suffer from snorng, and around 3% from OSA. It would suprise me if snoring in general has relation directly to a gene, but most certainly the problems / features of a person deffinitly do, and those are genetic obviously. But, OSA most deffinitly is inherited....whether they have managed to identify it now I have no idea as I said this was a very long time ago.
Just my $0.02 =)