FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term decreased cell number ID (Ontology) FBcv:0000359 (FlyBase CV)
Definition Phenotype that is a decrease in the number of cells in a whole animal or in some specific organ, tissue or clone of cells compared to wild-type. This phenotype is not necessarily accompanied by decreased growth - there may be fewer cells in an otherwise normal volume of tissue.
Also Known As "reduced cell number"
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Annotations
Records annotated with this term OR any of its CHILD TERMS
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Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPIC_CLASS    1650
Constructs (FBtp)  PHENOTYPIC_CLASS     913
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 Constructs
 decreased cell number (all annotations which use CV term, excluding "NOT" statements)    1650    913
     decreased cell number | adult stage     367    287
     decreased cell number | adult stage | cell autonomous       2      2
     decreased cell number | adult stage | clone of cells       1       --
     decreased cell number | adult stage | conditional      18     12
     decreased cell number | adult stage | dominant       2       --
     decreased cell number | adult stage | dominant | chemical conditional       1       --
     decreased cell number | adult stage | dominant | conditional       1       --
     decreased cell number | adult stage | drug conditional       3      3
     decreased cell number | adult stage | female       9      4
     decreased cell number | adult stage | female limited       2      1
     decreased cell number | adult stage | female | conditional       1       --
     decreased cell number | adult stage | female | somatic clone       2       --
     decreased cell number | adult stage | female | temperature conditional       1      1
     decreased cell number | adult stage | germline clone       2       --
     decreased cell number | adult stage | germline clone | progressive       1       --
     decreased cell number | adult stage | heat sensitive       4      3
     decreased cell number | adult stage | light conditional       1       --
     decreased cell number | adult stage | male       9      1
     decreased cell number | adult stage | male limited       2       --
     decreased cell number | adult stage | male | temperature conditional       2      1
     decreased cell number | adult stage | maternal effect       1       --
     decreased cell number | adult stage | progressive     104     74
     decreased cell number | adult stage | progressive | heat sensitive       1       --
     decreased cell number | adult stage | progressive | recessive       5       --
     decreased cell number | adult stage | progressive | RU486 conditional       4      4
     decreased cell number | adult stage | progressive | somatic clone       5       --
     decreased cell number | adult stage | recessive       3       --
     decreased cell number | adult stage | recessive | somatic clone       2       --
     decreased cell number | adult stage | semidominant | conditional       1       --
     decreased cell number | adult stage | somatic clone      91     36
     decreased cell number | adult stage | somatic clone - tissue specific       1       --
     decreased cell number | adult stage | somatic clone | conditional       1       --
     decreased cell number | blastoderm stage       3      3
     decreased cell number | blastoderm stage | germline clone | maternal effect       1       --
     decreased cell number | blastoderm stage | maternal effect       6      6
     decreased cell number | cell autonomous | germline clone | oogenesis       2      3
     decreased cell number | cell autonomous | larval stage | somatic clone       8       --
     decreased cell number | cell autonomous | oogenesis       4      5
     decreased cell number | cell autonomous | somatic clone       1       --
     decreased cell number | cell non-autonomous       5      1
     decreased cell number | cell non-autonomous | larval stage | somatic clone       2       --
     decreased cell number | conditional       4      3
     decreased cell number | dominant       5       --
     decreased cell number | dominant | larval stage       1       --
     decreased cell number | dominant | oogenesis       1       --
     decreased cell number | dominant | progressive       5       --
     decreased cell number | dorsal closure stage       1       --
     decreased cell number | early third instar larval stage       3      2
     decreased cell number | embryonic cycle 12       1       --
     decreased cell number | embryonic cycle 14       2       --
     decreased cell number | embryonic cycle 16       2       --
     decreased cell number | embryonic stage     105     47
     decreased cell number | embryonic stage 10       1       --
     decreased cell number | embryonic stage 11       8      5
     decreased cell number | embryonic stage 12       4      3
     decreased cell number | embryonic stage 13       2       --
     decreased cell number | embryonic stage 14       3       --
     decreased cell number | embryonic stage 15       8      4
     decreased cell number | embryonic stage 15 | germline clone | maternal effect       2       --
     decreased cell number | embryonic stage 15 | maternal effect       3       --
     decreased cell number | embryonic stage 15 | recessive       3       --
     decreased cell number | embryonic stage 16       7      6
     decreased cell number | embryonic stage 16 | germline clone | maternal effect       2       --
     decreased cell number | embryonic stage 16 | maternal effect       3       --
     decreased cell number | embryonic stage | female | maternal effect       2      3
     decreased cell number | embryonic stage | male | maternal effect       2      3
     decreased cell number | embryonic stage | maternal effect       8      3
     decreased cell number | embryonic stage | recessive       1       --
     decreased cell number | embryonic stage | somatic clone       2       --
     decreased cell number | female       1       --
     decreased cell number | female limited | progressive | third instar larval stage       1       --
     decreased cell number | female | larval stage | maternal effect       2      3
     decreased cell number | female | third instar larval stage       5      6
     decreased cell number | first instar larval stage       1       --
     decreased cell number | germline clone       1       --
     decreased cell number | germline clone | oogenesis       8       --
     decreased cell number | germline clone | oogenesis | progressive       4       --
     decreased cell number | germline clone | progressive       2       --
     decreased cell number | heat sensitive       5      2
     decreased cell number | larval stage     189    133
     decreased cell number | larval stage | conditional       6      5
     decreased cell number | larval stage | heat sensitive       1       --
     decreased cell number | larval stage | progressive       6      2
     decreased cell number | larval stage | progressive | somatic clone       1       --
     decreased cell number | larval stage | recessive       2       --
     decreased cell number | larval stage | recessive | somatic clone       1       --
     decreased cell number | larval stage | somatic clone      61     27
     decreased cell number | larval stage | somatic clone - tissue specific       1       --
     decreased cell number | larval stage | temperature conditional       4      1
     decreased cell number | late embryonic stage       3      1
     decreased cell number | late third instar larval stage       4      2
     decreased cell number | late third instar larval stage | recessive       2       --
     decreased cell number | male       6      6
     decreased cell number | male limited       3      3
     decreased cell number | male | third instar larval stage       3      2
     decreased cell number | maternal effect       4       --
     decreased cell number | nutrition conditional       4      4
     decreased cell number | oogenesis     102     58
     decreased cell number | oogenesis stage S10       2       --
     decreased cell number | oogenesis | conditional      13      7
     decreased cell number | oogenesis | progressive      15     11
     decreased cell number | oogenesis | progressive | somatic clone       3       --
     decreased cell number | oogenesis | recessive       1       --
     decreased cell number | oogenesis | somatic clone       8      2
     decreased cell number | oogenesis | temperature conditional       2       --
     decreased cell number | P-stage      14      5
     decreased cell number | P-stage | female       3      1
     decreased cell number | P-stage | somatic clone       3      2
     decreased cell number | prepupal stage       4       --
     decreased cell number | prepupal stage P1       4      3
     decreased cell number | progressive       9      9
     decreased cell number | progressive | recessive | spermatogenesis       2       --
     decreased cell number | progressive | somatic clone       2      1
     decreased cell number | progressive | somatic clone | third instar larval stage       1       --
     decreased cell number | progressive | spermatogenesis      26     13
     decreased cell number | progressive | third instar larval stage       2       --
     decreased cell number | pupal stage      20     13
     decreased cell number | pupal stage | heat sensitive       1       --
     decreased cell number | pupal stage | somatic clone      10      1
     decreased cell number | pupal stage | temperature conditional       3      1
     decreased cell number | recessive       8       --
     decreased cell number | recessive | somatic clone       3       --
     decreased cell number | recessive | somatic clone | third instar larval stage       1       --
     decreased cell number | recessive | third instar larval stage       1       --
     decreased cell number | recessive | wandering third instar larval stage       1       --
     decreased cell number | second instar larval stage       6      2
     decreased cell number | semidominant | spermatogenesis       1       --
     decreased cell number | somatic clone      87     23
     decreased cell number | somatic clone - Minute background | third instar larval stage       3       --
     decreased cell number | somatic clone - tissue specific | third instar larval stage       2       --
     decreased cell number | somatic clone | spermatogenesis      12      1
     decreased cell number | somatic clone | third instar larval stage      61      9
     decreased cell number | spermatogenesis      97     56
     decreased cell number | spermatogenesis | heat sensitive       3       --
     decreased cell number | third instar larval stage     132     90
     decreased cell number | third instar larval stage | conditional       5      4
     decreased cell number | wandering third instar larval stage       9      7
     decreased cell number | wandering third instar larval stage | heat sensitive       2       --
Spanning Tree (Parents/Children)
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  phenotype
   |__abnormal cell number
       |__decreased cell number  2605 rec.
           |__hypoplasia 68 rec.
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