apple tree

brad16 says...
Most sources regard it as not a self-polinator, but there are a few sources that note Dorsett Golden as self-pollinators (to some extent), but I would interpret this to mean that it is only 'possible' for it to fruit by itself. So if it did, it wouldn't be a big crop, maybe just a few.

If I actually wanted apples from it, I'd have something like an Anna in the vicinity.

Apples are placed into pollination groups that tell you how early/late in the season their flowers pollinate.
If you get any type of apple, it's a very good idea to find out what flower group it is, look at other apples in the same group and select one that interests you. You can go by "e;early, mid, late season"e; descriptions if you like, but the flower grouping system I use goes from 1 to 6, so flower groups target the flowering times a little more accurately.

I grow a pretty fair selection of apples, but not these ones so I suggested Anna, just because it's a popular one that flowers around the same time as Golden Dorsett.

You'll also get suggestions to graft another type of apple onto your tree. This is a great suggestion, especially if you are only going to have one tree and want a decent amount of apples, but you need access to scion (you can buy, swap or ask a nice sharing and caring person) and you need to be able to graft (which lots of people are not prepared or confident to do). Still you can ask someone else to graft for you if you know of someone.

Good luck. In short ... get a pollinator if you're lusting for apples.