The queen bee is 15-20 millimetres long and has ovaries full of eggs. Its sole operation is fertilisation and only 1 queen develops from impregnated eggs. One queen lays approx. 1500000 eggs in its whole life. Drone bees are the male bees. These are approx. 7-15 millimetres long. In these bees the  stings and secretion glands don't seem to be present. Like the queen they conjointly rely upon employee bees or worker bees for nutrition. Worker bees are maximum in a beehive. These are the tiniest bees. Worker bees are sterile females and are developed from impregnated eggs.