obsolete cellular morphogenesis involved in pheromone-induced unidirectional conjugation true cellular morphogenesis involved in pheromone-induced unidirectional conjugation GO:0000764 OBSOLETE. The change in form (cell shape and size) that contributes to sexual reproduction in order to facilitate direct contact between the compatible mating types in organisms that undergo pheromone-induced unidirectional conjugation. biological_process This term was made obsolete because unidirectional conjugation occurs only in prokaryotes, which do not undergo morphogenetic changes associated with conjugation. In short, the process described by this term does not occur. cellular morphogenesis during pheromone-induced unidirectional