FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term lethal ID (Ontology) FBcv:0000351 (FlyBase CV)
Definition A phenotype of a population that is the death of all animals in that population at some stage or stages prior to becoming a mature adult, where mature is defined as after adult stage A3 (FBdv:00006012).
Comment
Links to External Ontologies
Annotations
Records annotated with this term OR any of its CHILD TERMS

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Direct annotations: records annotated with this exact term (child terms are NOT included)
Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPIC_CLASS
Insertions (FBti)LETHALITY
Constructs (FBtp)PHENOTYPIC_CLASS
Constructs (FBtp)USES
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 Insertions Constructs
 lethal (all annotations which use CV term, excluding "NOT" statements)
     lethal | abnormal dorsal/ventral axis specification | maternal effect
      --       --
     lethal | abnormal dorsal/ventral axis specification | maternal effect | recessive
      --       --
     lethal | adult stage
     lethal | adult stage | female       --
      --
     lethal | adult stage | female | cold sensitive
      --       --
     lethal | adult stage | heat sensitive
      --       --
     lethal | adult stage | recessive
      --
     lethal | adult stage | recessive | heat sensitive
      --       --
     lethal | cell autonomous | recessive | somatic clone
      --       --
     lethal | chemical conditional
      --
     lethal | chemical conditional | recessive
      --       --
     lethal | cold sensitive
      --
     lethal | conditional
      --
     lethal | conditional | embryonic stage
      --
     lethal | conditional | pupal stage
      --       --
     lethal | conditional | recessive
      --       --
     lethal | dominant
     lethal | dominant | cold sensitive
      --       --
     lethal | dominant | embryonic stage | maternal effect
      --
     lethal | dominant | heat sensitive
      --
     lethal | dominant | male
      --
     lethal | dominant | male limited
      --
     lethal | dominant | maternal effect
     lethal | dominant | maternal effect | heat sensitive
      --       --
     lethal | dominant | non-rescuable maternal effect
      --       --
     lethal | dominant | pupal stage | heat sensitive
      --       --
     lethal | egg stage | maternal effect
      --       --
     lethal | embryonic stage
     lethal | embryonic stage | germline clone
      --
     lethal | embryonic stage | germline clone | maternal effect
      --
     lethal | embryonic stage | germline clone | maternal effect | recessive
      --
     lethal | embryonic stage | germline clone | neurogenic phenotype | recessive
      --       --
     lethal | embryonic stage | germline clone | non-rescuable maternal effect
      --       --
     lethal | embryonic stage | germline clone | non-rescuable maternal effect | recessive
      --       --
     lethal | embryonic stage | germline clone | recessive
      --
     lethal | embryonic stage | germline clone | recessive | rescuable maternal effect
      --       --
     lethal | embryonic stage | germline clone | rescuable maternal effect
      --       --
     lethal | embryonic stage | heat sensitive
      --
     lethal | embryonic stage | homeotic | recessive
      --       --
     lethal | embryonic stage | male | recessive
      --       --
     lethal | embryonic stage | maternal effect
      --
     lethal | embryonic stage | maternal effect | recessive
      --
     lethal | embryonic stage | maternal effect | recessive | heat sensitive
      --       --
     lethal | embryonic stage | non-rescuable maternal effect
      --       --
     lethal | embryonic stage | non-rescuable maternal effect | recessive
      --
     lethal | embryonic stage | non-rescuable maternal effect | recessive | heat sensitive
      --       --
     lethal | embryonic stage | recessive
      --
     lethal | embryonic stage | recessive | heat sensitive
      --       --
     lethal | embryonic stage | recessive | rescuable maternal effect
      --
     lethal | embryonic stage | rescuable maternal effect
      --
     lethal | embryonic stage | rescuable maternal effect | cold sensitive
      --       --
     lethal | female
     lethal | female limited
     lethal | female limited | cold sensitive
      --
     lethal | female limited | maternal effect
      --
     lethal | female limited | pupal stage
      --       --
     lethal | female limited | recessive
      --
     lethal | female limited | temperature conditional
      --       --
     lethal | female | first instar larval stage | recessive
      --       --
     lethal | female | heat sensitive
      --
     lethal | female | maternal effect | heat sensitive
      --       --
     lethal | female | maternal effect | recessive
      --       --
     lethal | female | pupal stage
     lethal | female | recessive
      --
     lethal | female | recessive | heat sensitive
      --       --
     lethal | first instar larval stage
     lethal | first instar larval stage | germline clone
      --
     lethal | first instar larval stage | germline clone | maternal effect
      --       --
     lethal | first instar larval stage | heat sensitive
      --
     lethal | first instar larval stage | male | recessive
      --       --
     lethal | first instar larval stage | maternal effect | recessive
      --       --
     lethal | first instar larval stage | recessive
      --
     lethal | germline clone
      --       --
     lethal | germline clone | larval stage
      --
     lethal | germline clone | larval stage | recessive
      --
     lethal | germline clone | late embryonic stage
      --
     lethal | germline clone | male limited
      --
     lethal | germline clone | male | rescuable maternal effect
      --
     lethal | germline clone | maternal effect
      --
     lethal | germline clone | maternal effect | neurogenic phenotype | recessive
      --       --
     lethal | germline clone | maternal effect | recessive
      --
     lethal | germline clone | neurogenic phenotype
      --       --
     lethal | germline clone | neurogenic phenotype | recessive
      --       --
     lethal | germline clone | neurogenic phenotype | recessive | rescuable maternal effect
      --       --
     lethal | germline clone | non-rescuable maternal effect
      --
     lethal | germline clone | oogenesis
      --       --
     lethal | germline clone | pharate adult stage
      --
     lethal | germline clone | pharate adult stage | recessive
      --       --
     lethal | germline clone | recessive
      --       --
     lethal | germline clone | recessive | rescuable maternal effect
      --
     lethal | germline clone | rescuable maternal effect
      --       --
     lethal | heat sensitive
      --
     lethal | homeotic
      --       --
     lethal | homeotic | recessive
      --       --
     lethal | larval stage
     lethal | larval stage | heat sensitive
      --
     lethal | larval stage | male
      --       --
     lethal | larval stage | maternal effect
      --       --
     lethal | larval stage | maternal effect | recessive
      --       --
     lethal | larval stage | partially | recessive
      --       --
     lethal | larval stage | recessive
      --
     lethal | larval stage | recessive | heat sensitive
      --       --
     lethal | larval stage | somatic clone
      --
     lethal | larval stage | temperature conditional
      --
     lethal | late embryonic stage
      --
     lethal | late third instar larval stage
      --
     lethal | late third instar larval stage | recessive
      --       --
     lethal | male
     lethal | male limited
     lethal | male limited | chemical conditional
      --
     lethal | male limited | cold sensitive
      --
     lethal | male limited | heat sensitive
      --
     lethal | male limited | maternal effect
      --
     lethal | male limited | recessive
      --       --
     lethal | male limited | third instar larval stage
      --
     lethal | male limited | third instar larval stage | temperature conditional
      --
     lethal | male | cold sensitive
      --       --
     lethal | male | heat sensitive
      --
     lethal | male | pharate adult stage
      --
     lethal | male | pupal stage
      --       --
     lethal | male | recessive
      --
     lethal | male | recessive | cold sensitive
      --       --
     lethal | male | recessive | heat sensitive
      --       --
     lethal | maternal effect
     lethal | maternal effect | cold sensitive
      --       --
     lethal | maternal effect | heat sensitive
      --       --
     lethal | maternal effect | non-rescuable maternal effect
      --       --
     lethal | maternal effect | pupal stage
      --       --
     lethal | maternal effect | recessive
      --
     lethal | maternal effect | recessive | cold sensitive
      --       --
     lethal | maternal effect | recessive | heat sensitive
      --       --
     lethal | maternal effect | semidominant
      --       --
     lethal | maternal effect | somatic clone
      --
     lethal | neurogenic phenotype
      --       --
     lethal | neurogenic phenotype | heat sensitive
      --
     lethal | neurogenic phenotype | recessive
      --
     lethal | neurogenic phenotype | recessive | heat sensitive
      --       --
     lethal | neurogenic phenotype | rescuable maternal effect
      --       --
     lethal | non-rescuable maternal effect
      --
     lethal | non-rescuable maternal effect | heat sensitive
      --       --
     lethal | non-rescuable maternal effect | recessive
      --
     lethal | non-rescuable maternal effect | recessive | heat sensitive
      --       --
     lethal | nutrition conditional
      --
     lethal | P-stage
     lethal | P-stage | recessive
      --       --
     lethal | parental effect
     lethal | parental effect | recessive
      --       --
     lethal | partially | heat sensitive
      --       --
     lethal | partially | pupal stage | recessive
      --       --
     lethal | paternal effect
      --
     lethal | paternal effect | recessive
      --       --
     lethal | pharate adult stage
     lethal | pharate adult stage P10
      --       --
     lethal | pharate adult stage P14
      --
     lethal | pharate adult stage P15
      --
     lethal | pharate adult stage P15(ii)
      --
     lethal | pharate adult stage P8 | heat sensitive
      --
     lethal | pharate adult stage | heat sensitive
      --
     lethal | pharate adult stage | recessive
      --
     lethal | pharate adult stage | temperature conditional
      --
     lethal | prepupal stage
     lethal | prepupal stage P1
      --
     lethal | prepupal stage P2
      --       --
     lethal | prepupal stage P4(ii)
      --
     lethal | prepupal stage | heat sensitive
      --
     lethal | prepupal stage | recessive
      --
     lethal | pupal stage
     lethal | pupal stage P5
      --
     lethal | pupal stage P5(i)
      --
     lethal | pupal stage P7
      --
     lethal | pupal stage | cold sensitive
      --
     lethal | pupal stage | heat sensitive
      --
     lethal | pupal stage | recessive
      --
     lethal | pupal stage | recessive | heat sensitive
      --       --
     lethal | pupal stage | recessive | somatic clone
      --       --
     lethal | pupal stage | somatic clone
      --
     lethal | pupal stage | temperature conditional
      --
     lethal | recessive
     lethal | recessive | cold sensitive
      --       --
     lethal | recessive | heat sensitive
      --
     lethal | recessive | rescuable maternal effect
      --
     lethal | recessive | rescuable maternal effect | heat sensitive
      --       --
     lethal | recessive | second instar larval stage
      --       --
     lethal | recessive | temperature conditional
      --       --
     lethal | recessive | third instar larval stage
      --
     lethal | recessive | third instar larval stage | heat sensitive
      --       --
     lethal | rescuable maternal effect
      --
     lethal | rescuable maternal effect | heat sensitive
      --       --
     lethal | RU486 conditional
      --
     lethal | second instar larval stage
     lethal | semidominant
      --       --
     lethal | semidominant | cold sensitive
      --       --
     lethal | semidominant | heat sensitive
      --       --
     lethal | somatic clone
     lethal | somatic clone | third instar larval stage
      --       --
     lethal | temperature conditional
      --
     lethal | tetracycline conditional
      --
     lethal | third instar larval stage
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  increased mortality
   |__increased mortality during development
       |__lethal  46921 rec.
           |__lethal - all die before end of P-stage 17616 rec.
           |   |__lethal - all die before end of pupal stage(+) 15052 rec.
           |   |__lethal - all die during P-stage(+) 2105 rec.
           |__lethal - all die during immature adult stage 6 rec.
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