Queens with no special characteristic
Queens from one strain, but mated by drones from another strain. Their population and daughters (and drones of them) are F1 crossed.
Queen and Drones result of a cross between two different lines : interesting to increase their resistance and qualities.
Queen and Drones are Aunt-Nephews : that would correspond by us to a Sister-Brothers crossing.
Queen and Drones have the same ancestors: combination to increase or stabilize some characteristics.
Queen and/or Drones have unknown exact origin : that makes unable to find their real status.
Queen and Drones, Aunt-Nephews, are F1 this is a real Mendelian F1 cross.