FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term nucleus ID (Ontology) GO:0005634 (Gene Ontology)
Definition A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.
Also Known As "cell nucleus"
Comment
Links to External Ontologies
  QuickGO data     AmiGO data
Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN     131
Genes (FBgn)  GO_CELLULAR_COMPONENT    2434
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      23
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      59
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Gene Groups Genes Insertions Constructs
 nucleus (all annotations which use CV term, excluding "NOT" statements)     131    112   2465     23     78
     colocalizes_with | nucleus       --       --       6       --       --
     is_active_in | nucleus       --       --    1580       --       --
     located_in | nucleus       --       --    1542       --       --
     nucleus | adult stage      69       --       --       --      57
     nucleus | adult stage | cell autonomous       3       --       --       --       3
     nucleus | adult stage | cell non-autonomous       2       --       --       --       2
     nucleus | adult stage | conditional       2       --       --       --       1
     nucleus | adult stage | decreased number       2       --       --       --       1
     nucleus | adult stage | decreased number | male       4       --       --       --       4
     nucleus | adult stage | female       7       --       --       --       5
     nucleus | adult stage | male       5       --       --       --       2
     nucleus | adult stage | somatic clone       2       --       --       --       --
     nucleus | blastoderm stage       4       --       --       --       2
     nucleus | blastoderm stage | germline clone       1       --       --       --       --
     nucleus | blastoderm stage | maternal effect       2       --       --       --       --
     nucleus | blastoderm stage | non-rescuable maternal effect       1       --       --       --       --
     nucleus | cell autonomous | larval stage | somatic clone       9       --       --       --       9
     nucleus | cell autonomous | somatic clone       1       --       --       --       --
     nucleus | conditional | embryonic stage 4       1       --       --       --       --
     nucleus | decreased number | embryonic stage       1       --       --       --       --
     nucleus | decreased number | embryonic stage 16       3       --       --       --       3
     nucleus | decreased number | embryonic stage | paternal effect       1       --       --       --       --
     nucleus | decreased number | fertilized egg stage | maternal effect       3       --       --       --       3
     nucleus | decreased number | germline clone | oogenesis       1       --       --       --       --
     nucleus | decreased number | larval stage       9       --       --       --       8
     nucleus | decreased number | oogenesis       3       --       --       --       4
     nucleus | ectopic | embryonic stage 4 | maternal effect       1       --       --       --       --
     nucleus | ectopic | female       5       --       --       --       6
     nucleus | ectopic | heat sensitive       1       --       --       --       --
     nucleus | embryonic cycle 11       1       --       --       --       --
     nucleus | embryonic cycle 12       1       --       --       --       --
     nucleus | embryonic cycle 12 | germline clone | maternal effect       1       --       --       --       --
     nucleus | embryonic cycle 13       1       --       --       --       --
     nucleus | embryonic cycle 13 | germline clone | maternal effect       1       --       --       --       --
     nucleus | embryonic cycle 14 | germline clone | maternal effect       2       --       --       --       --
     nucleus | embryonic cycle 6 | maternal effect       2       --       --       --       --
     nucleus | embryonic stage      44       --       --       --      12
     nucleus | embryonic stage 16       6       --       --       --       3
     nucleus | embryonic stage 16 | increased number       1       --       --       --       --
     nucleus | embryonic stage 4      17       --       --       --       4
     nucleus | embryonic stage 4 | germline clone       8       --       --       --       --
     nucleus | embryonic stage 4 | germline clone | maternal effect       1       --       --       --       --
     nucleus | embryonic stage 4 | germline clone | non-rescuable maternal effect       2       --       --       --       --
     nucleus | embryonic stage 4 | maternal effect       7       --       --       --       --
     nucleus | embryonic stage 5       5       --       --       --       5
     nucleus | embryonic stage 5 | germline clone | maternal effect       1       --       --       --       --
     nucleus | embryonic stage 5 | maternal effect       3       --       --       --       3
     nucleus | embryonic stage 9       2       --       --       --       2
     nucleus | embryonic stage | germline clone       8       --       --       --       --
     nucleus | embryonic stage | increased number       5       --       --       --       4
     nucleus | embryonic stage | maternal effect      22       --       --       --       6
     nucleus | embryonic stage | maternal effect | heat sensitive       1       --       --       --       --
     nucleus | embryonic stage | parental effect       2       --       --       --       --
     nucleus | extended germ band stage       1       --       --       --       --
     nucleus | female       4       --       --       --       2
     nucleus | female limited       4       --       --       --       2
     nucleus | female limited | somatic clone - tissue specific       2       --       --       --       1
     nucleus | first instar larval stage       2       --       --       --       1
     nucleus | gastrula stage       1       --       --       --       --
     nucleus | germline clone       9       --       --       --       --
     nucleus | germline clone | increased number       1       --       --       --       --
     nucleus | germline clone | maternal effect | pre-blastoderm stage       1       --       --       --       --
     nucleus | germline clone | oogenesis stage S14       1       --       --       --       --
     nucleus | increased number      17       --       --       --      13
     nucleus | increased number | larval stage      10       --       --       --       9
     nucleus | increased number | male       4       --       --       --       2
     nucleus | increased number | oogenesis       2       --       --       --       3
     nucleus | increased number | third instar larval stage      10       --       --       --       8
     nucleus | larval stage      89       --       --       --      55
     nucleus | larval stage | nutrition conditional       4       --       --       --       4
     nucleus | larval stage | somatic clone       6       --       --       --       3
     nucleus | larval stage | somatic clone - Minute background       1       --       --       --       --
     nucleus | male       7       --       --       --       2
     nucleus | maternal effect       3       --       --       --       --
     nucleus | oogenesis      17       --       --       --      12
     nucleus | oogenesis stage S14       1       --       --       --       --
     nucleus | oogenesis stage S7       1       --       --       --       --
     nucleus | oogenesis stage S8       1       --       --       --       --
     nucleus | oogenesis | somatic clone       1       --       --       --       --
     nucleus | P-stage       4       --       --       --       --
     nucleus | P-stage | somatic clone - tissue specific       1       --       --       --       --
     nucleus | pharate adult stage       2       --       --       --       1
     nucleus | pre-blastoderm stage       3       --       --       --       --
     nucleus | progressive       2       --       --       --       2
     nucleus | pupal stage       3       --       --       --       3
     nucleus | pupal stage | somatic clone       1       --       --       --       --
     nucleus | pupal stage | somatic clone | temperature conditional       1       --       --       --       --
     nucleus | RU486 conditional       2       --       --       --       2
     nucleus | somatic clone       9       --       --       --       8
     nucleus | somatic clone - Minute background | third instar larval stage       1       --       --       --       --
     nucleus | somatic clone | spermatogenesis       1       --       --       --       --
     nucleus | somatic clone | third instar larval stage       3       --       --       --       2
     nucleus | somatic clone | wandering third instar larval stage       2       --       --       --       --
     nucleus | spermatogenesis      29       --       --       --       6
     nucleus | spermatogenesis | third instar larval stage       1       --       --       --       --
     nucleus | third instar larval stage      76       --       --       --      38
 NOT | located_in | nucleus       --       --       1       --       --
Spanning Tree (Parents/Children)
Only view relationship:
membrane-bounded organelle__
intracellular organelle_____|
                            intracellular membrane-bounded organelle
                             |__nucleus  3933 rec.
                                 |__ascospore-type prospore nucleus
                                 |__generative cell nucleus
                                 |__germ cell nucleus 79 rec.
                                 |   |__female germ cell nucleus(+) 28 rec.
                                 |   |__male germ cell nucleus 50 rec.
                                 |__left nucleus
                                 |__macronucleus
                                 |__megasporocyte nucleus
                                 |   |__antipodal cell nucleus
                                 |   |__megagametophyte egg cell nucleus
                                 |   |__polar nucleus
                                 |__micronucleus
                                 |__microsporocyte nucleus
                                 |__primary endosperm nucleus
                                 |__pronucleus 33 rec.
                                 |   |__female pronucleus 17 rec.
                                 |   |__male pronucleus 18 rec.
                                 |__right nucleus
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Is a intracellular membrane-bounded organelle
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Synonyms
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NIF_Subcellular:sao1702920020
Wikipedia:Cell_nucleus