ApiNews this week included a link to a video by Dean Stiglitz. Dean ran the Treatment Free Bee Conference that Julia, Noah and I went to this summer. He is also the author with his wife Laurie of the Complete Idiot's Guide to Beekeeping - which is a great book (so far--I'm reading it cover to cover this winter and am not through yet.)
Dean gave a version of this talk at the conference in Massachusetts. The slides in the video that I am sharing in this post are a little off - don't know what was wrong in the YouTube video - but you can make sense of them anyway.
He obviously had a very short amount of time to give this presentation, but he did a good job of explaining how the drone's genetics work in the mating with the queen.
I thought you all might enjoy it: