You can tell with recessives if you use visuals...
Ex...
Albino male, Pied male x Albino female...You could get all Albinos, all Normals or a split clutch...Any Normals produced would be 100% DH Albino Pied.
I got ya, I was just looking at it a bit differently. Say if you bred an albino, pied, ect, multiple recessive males to the same normal female you wouldnt know who was the father and what exactly any of them are 100% het for.