"This relation is primarily used in the worm anatomy ontology for representing lineage at the level of nuclei. However, it is applicable to any organismal cell lineage." . "child nucleus of" . "c is a child nucleus of d if and only if c and d are both nuclei and parts of cells c' and d', where c' is derived from d' by mitosis and the genetic material in c is a copy of the generic material in d" . . "Chris Mungall" . . . . "ABal nucleus child nucleus of ABa nucleus (in C elegans)" .