 Mendelian experiments fostered a particulate view of heredity in the way that two factors influence a given trait. (In that sense, the old transmission conception had not been fully banished.) Yet Johannsen wanted the genotype to be seen as a whole: “[C]haracters may be determined by several different genes, and… one sort of gene may have influence upon several different reactions” (1911: 153). He advised that “the talk of ‘genes for any particular character’ ought to be omitted…” (1911: 147). If this view was to be made into exact science, some method for analyzing the genotypical constitution or genotype as a whole was needed. Johannsen did not provide one.