Aberration Dmel\Df(1)f257-6

General Information
Symbol	Dmel\Df(1)f257-6	Species	D. melanogaster
Name	Deficiency (1) forked	FlyBase ID	FBab0000810
Feature type	chromosomal_deletion

Computed Breakpoints include	15F1;16A7
Deleted segment	15F1--16A7
Sequence coordinates
Member of large scale dataset(s)
Recent Updates
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FB2013_03
FB2013_02
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Nature of the Aberration
Cytological Order
Progenitor	Dp(1;1)B (Sutton, 1943)
Mutagen	spontaneous (Sutton, 1943)
Class of aberration (relative to progenitor)	chromosomal_deletion (Sutton, 1943)
Breakpoints	15F1-15F2;16A7 (Sutton, 1943)
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data	bk1 << B << bk2
Genetic mapping information
Comments
Comments on Cytology
	Deletes the first repeat of the 16A region. (Sutton, 1943) Left limit of break 1 from polytene analysis (FBrf0005979) Right limit of break 1 from polytene analysis (citation unavailable) Limits of break 2 from polytene analysis (FBrf0005979)
Sequence Crossreferences
DDBJ / EMBL / GenBank	DNA sequence Protein sequence Name
Gene Deletion & Duplication Data
Genes Deleted / Disrupted
Complementation Data
Completely deleted / disrupted	B (Sutton, 1943)
Molecular Data
Genes NOT Deleted / Disrupted
Complementation Data
Molecular Data
Genes Duplicated
Complementation Data
Molecular Data
Genes NOT Duplicated
Complementation Data
Molecular Data
Related Comments

Phenotypic Data
In combination with other aberrations
NOT in combination with other aberrations	Eyes are wild type. Lethal in homozygous and hemizygous condition. (Sutton, 1943) lethal cell lethal
Stocks ( 0 )

Notes on Origin
Discoverer	Bridges, 1917. Bridges, 1917. (Sutton, 1943)

Balancer / Genotype Variants of the Aberration

Separable Components

Other Comments
	Identity of Df(1)f257-6 with the Bridges f B deficiency claimed in Bridges and Brehme (1942), but this does not seem well established. Bridges's case was the first recorded deficiency; in 1925, it was claimed to be lost. Df(1)f257-6 obtained by Demerec from Pasadena in 1933 as a f B deficiency.
Synonyms & Secondary IDs ( 4 )
Reported As
Symbol Synonym	Df(1)f257-6 Df(1)f^257-6 Df(1)fB-257-6 (Sutton, 1943)
Name Synonym	Deficiency (1) forked
Secondary FlyBase IDs

References ( 5 )
Research paper	Sutton, 1943, Genetics 28: 97--107 Bar eye in Drosophila melanogaster: A cytological analysis of some mutations and reverse mutations. [FBrf0005979]
FlyBase analysis	FlyBase, 2007, En masse symbol-based assigment of Aberration Class with respect to wild type. En masse symbol-based assigment of Aberration Class with respect to wild type. [FBrf0191808]
Book	Lindsley and Zimm, 1992, The Genome of Drosophila melanogaster. The Genome of Drosophila melanogaster. [FBrf0066905] Lindsley and Grell, 1968, Publs Carnegie Instn 627: 469pp Genetic variations of Drosophila melanogaster. [FBrf0020044] Morgan et al., 1925, Biblphia Genet. 2: 262pp The genetics of Drosophila melanogaster. [FBrf0001379]