Interesting article on why a female egg develops into either a queen or a worker. It’s not the presence of royal jelly in the queen’s diet but rather the absence of compounds found in pollen. It is these compounds, flavonoids, that suppress the development of the workers ovaries.
http://www.wired.com/2015/09/royal-jelly-isnt-makes-queen-bee-queen-bee/
West Kootenay Beekeepers 