Aberration Dmel\Df(YS)bb^-

General Information
Symbol	Dmel\Df(YS)bb^-	Species	D. melanogaster
Name		FlyBase ID	FBab0010473
Feature type	chromosomal_deletion
Also Known As	Ybb^-

Computed Breakpoints include
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
Mutagen
Class of aberration (relative to progenitor)
Breakpoints
Causes alleles
Carries alleles
Transposon Insertions
Formalized genetic data
Genetic mapping information
Comments
Comments on Cytology

Sequence Crossreferences
DDBJ / EMBL / GenBank	DNA sequence Protein sequence Name
Gene Deletion & Duplication Data
Genes Deleted / Disrupted
Complementation Data
Completely deleted / disrupted	Ybb (Durica and Krider, 1978)
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	Viable in D.melanogaster-:-D.simulans hybrid males. (Durica and Krider, 1978) YS one third normal length
Stocks ( 7 )
Bloomington	736 Df(YS)bb^-/y² eq¹
Kyoto	101141 In(1)w^m4h / Df(YS)bb^- 106054 Df(YS)bb^-/y² eq¹ 101260 y¹ eq¹ / Df(YS)bb^- 106711 Df(YS)bb^-; Df(3R)ME15, mwh¹ red¹ e⁴/MKRS 101069 Df(YS)bb^- / In(1)sc^4Lsc^8R+Tp(1;YS)bb^AM1, y¹ sc⁴ sc⁸ w¹ Tu¹ 101070 Df(YS)bb^- / In(1)sc^4Lsc^8R+Tp(1;YS)bb^AM7, y¹ sc⁴ sc⁸ w⁺ Tu¹
Notes on Origin
Discoverer	Schultz, 8th Nov. 1933.

Balancer / Genotype Variants of the Aberration

Separable Components

Other Comments
	One of a group of Y chromosomes that carry insufficient numbers of ribosomal genes to produce wild-type bristle morphology. They are characterized by having 125 or fewer ribosomal cistrons compared to 225 in wild-type Y chromosomes. Since numbers of ribosomal cistrons are unstable and subject to change by magnification or reduction, the estimates of cistron number presented here represent historical observations and need not reflect current compositions. The distinction between chromosomes designated Ybb^- and those designated Ybb not always based on objective criteria; however, Ybb chromosomes are generally hemizygous viable whereas Ybb^- chromosomes are generally hemizygous lethal <up>e.g., in In(1)sc^4Lsc^8R/Ybb^-</up> and therefore have few if any ribosomal cistrons. The original Ybb^- was shown to have a foreshortened short arm; despite this cytological deficiency, however, derivative chromosomes with increased numbers of ribosomal genes have been recovered.
Synonyms & Secondary IDs ( 4 )
Reported As
Symbol Synonym	Df(Y)bb Df(YS)bb Df(YS)bb^- Ybb^- (Endow, 1982, Durica and Krider, 1978, )
Name Synonym
Secondary FlyBase IDs

References ( 5 )
Research paper	Palumbo et al., 1984, Mol. Gen. Genet. 195(1-2): 35--38 A method for the molecular characterization of bb¹ loci in Drosophila melanogaster. [FBrf0041492] Endow, 1982, Genetics 102: 91--99 Molecular characterization of ribosomal genes on the Ybb^- chromosome of Drosophila melanogaster. [FBrf0038078] Durica and Krider, 1978, Genetics 89: 37--64 Studies on the ribosomal RNA cistrons in interspecific Drosophila hybrids. [FBrf0031636]
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]

Aberration Dmel\Df(YS)bb-

Aberration Dmel\Df(YS)bb^-