The queen is the only one who can lay eggs and they do it from the ovipositor. The queen also secretes a chemical substance that has hormonal properties from her mandibular glands which inhibits ovary growth in the female worker bees. This is also named queen substance or pheromone. This, in turn, controls the activities of the bee in the hive. The queen with this can attract the worker bees towards her and make them build wax cells for workers and drones but prevents them from building the queen cells. A scientist named Johann Dzierzan in 1980 found that the queen is the center of the beehive and the mother of the young bees.