Although individual bees don’t live very long, all bees in a hive are from eggs laid by a single queen. So genetically a generation would be a hive. IIRC hives

Although individual bees don’t live very long, all bees in a hive are from eggs laid by a single queen. So genetically a generation would be a hive. IIRC hives swarm (i.e. procreate) roughly once a year.