chimerism http://purl.bioontology.org/ontology/MEDDRA/10068051 http://purl.bioontology.org/ontology/MESH/D046528 http://purl.obolibrary.org/obo/NCIT_C62582 https://en.wikipedia.org/wiki/Category:Chimerism The occurrence in an individual of two or more cell populations of different chromosomal constitutions, derived from different individuals. This contrasts with mosaicism in which the different cell populations are derived from a single individual. genetic chimerism chromosomal condition