FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

temperature conditional loss of function allele

ID (Ontology)

FBcv:0000745 (FlyBase CV)

Definition

An allele that at some temperatures but not others either makes no functional gene product or makes reduced levels of a normally functioning gene product or makes a gene product with reduced activity compared to wild-type.[ FlyBase:FBrf0049147 ]

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 Class	Field	Direct annotations
Alleles (FBal)	ALLELE_CLASS
Alleles (FBal)	PROMOTED_CLASS

Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records

Full annotation statements	Relevant FlyBase reports
Full annotation statements	Alleles
temperature conditional loss of function allele (all annotations which use CV term, excluding "NOT" statements)

Spanning Tree (Parents/Children)

  allele class
   |__loss of function allele
       |__temperature conditional loss of function allele  122 rec.
           |__cold sensitive loss of function allele 11 rec.
           |   |__cold sensitive amorphic allele(+) 1 rec.
           |   |__cold sensitive hypomorphic allele(+) 7 rec.
           |__heat sensitive loss of function allele 100 rec.
           |   |__heat sensitive amorphic allele(+) 5 rec.
           |   |__heat sensitive hypomorphic allele(+) 50 rec.
           |__temperature conditional amorphic allele 8 rec.
           |   |__cold sensitive amorphic allele(+) 1 rec.
           |   |__heat sensitive amorphic allele(+) 5 rec.
           |   |__temperature conditional amorphic allele - genetic evidence(+) 6 rec.
           |   |__temperature conditional amorphic allele - molecular evidence(+) 2 rec.
           |__temperature conditional hypomorphic allele 62 rec.
               |__cold sensitive hypomorphic allele(+) 7 rec.
               |__heat sensitive hypomorphic allele(+) 50 rec.
               |__temperature conditional hypomorphic allele - genetic evidence(+) 56 rec.
               |__temperature conditional hypomorphic allele - molecular evidence(+) 2 rec.

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	loss of function allele
Part of
Synonyms & Secondary IDs
Synonyms

Secondary IDs

External Crossreferences & Linkouts