A laying worker is a worker bee that lays unfertilized eggs in the absence of a queen. Only drones (male bees) develop from the eggs of a laying worker because drones only have one set of chromosomes from the mother.
This is one sign that you have a laying worker in your hive and that the hive is queenless. You can see multiple eggs in a single cell.
This particular hive we knew was queenless because we were trying to let the hive rear a new queen, but they were unsuccessful. Â We bought a queen and introduced her to the hive. All is well now.
Beelievable 
Great photo of a laying worker bee’s eggs in a cell. I’ve never seen this before.