title: Symposium No. 6: Gene and chromosome inactivation. Introduction by the Chairman.
mesh_terms: D000818:Animals; D002843:Chromatin / Q000502:physiology; D002875:Chromosomes; D004794:Enzyme Repression; D005796:Genes; D005815:Genetic Code; D006570:Heterochromatin / Q000502:physiology; D006801:Humans; D012730:Sex Chromosomes / Q000502:physiology; D014158:Transcription, Genetic
chemical_list: D002843:Chromatin; D006570:Heterochromatin