In my case, I thought I was being slick.  Rarely being able to find the 
queen anyway, I separated the (3 mediums) brood chamber putting an 
excluder over the #2 box, a super over that and (former) brood box #3 on 
top. 11 days later, worker cells were being converted to drones above and 
below.

I thought the old queen may have simply run out of drone juice which has 
happened to me before.  And for all I know that may be the case, But 
instead of getting a queenless brood chamber to which I could add a queen, 
I now have boxes filled with bees with no mated queen.

-- Visit www.honeybeeworld.com/bee-l for rules, FAQ and  other info ---