Really the only way to tell without a microscope is to take pollen from a known dip and a known tet and pollinate the NOID with both and mark the blooms with a tag, colored paperclip, etc, so you will know which one had dip and which one had tet pollen dabbed. I would do this several times with each pollen and then whichever one makes it to the end and has viable seeds is the correct ploidy.
