Worker bees will reproduce when the hive queen's suppression pheremone disappears. Of course, they're not fertilized so they only produce haploid offspring, who in the bee world are all male and hence useless for anything but mating with a queen. Worker bees can't mate.
Haha, thank you for the correction but also thank you for appending that last sentence, because otherwise I was going to say "Yes, okay, but Darwin probably didn't mean..."
But I understand the sentiment.