inviable spore inviable aneuploid spore 2020-06-15T13:11:21Z Thes phenotype can be observed after a polyploid meiosis, where aneuploid spores no longer form small colonies. This results in an increase of large to small colonies and decreased spore viability. decreased aneuploid spore viability A viability phenotype in which an aneuploid spore is unable to survive under conditions in which wild type spores survive. An inviable spore does not germinate. abolished aneuploid spore germination decreased viability of aneuploid cells midori lethal in aneuploid spore FYPO:0007391 aneuploid spore germination abolished decreased viability of aneuploid spores