Re: worker bees not identical sisters
You are correct, plus a bit more.
Drones (as someone notes below) are haploid and male, workers and the queen are all diploid and female. They are not identical clones because firstly of meiosis which mixes things up, and secondly on a mating flight a queen tends to be very promiscuous and mate with six or so drones in an afternoon. Which must be quite tiring for her, not quite as bad as for the drones whose knackers explode at the climax of the act.
So with the semen of six drones in her the workers are half-sisters sharing six different fathers.
In a further mind-bending thought, when you think it through a drone has no father and cannot have any sons. He has a grandfather and can have grandchildren.
As that great philosopher Winnie The Pooh said "You never can tell with bees."