Cytogenetic analysis of the X chromosome region 2B3-4 ? 2B11 of Drosophila melanogaster

Chromosoma ◽  
1982 ◽  
Vol 86 (2) ◽  
pp. 251-263 ◽  
Author(s):  
Elena S. Belyaeva ◽  
Igor F. Zhimulev
Keyword(s):  
Drosophila Melanogaster ◽  
X Chromosome ◽  
Cytogenetic Analysis ◽  
Chromosome Region

Cytogenetic analysis of the X-chromosome region 2B1-2-2B9-10 of Drosophila melanogaster

Chromosoma ◽  
1985 ◽  
Vol 92 (5) ◽  
pp. 351-356 ◽  
Author(s):  
Z. M. Biyasheva ◽  
E. S. Belyaeva ◽  
I. F. Zhimulev
Keyword(s):  
Drosophila Melanogaster ◽  
X Chromosome ◽  
Cytogenetic Analysis ◽  
Chromosome Region

Cytogenetic analysis of the 2B3-4-2B11 Region of the X-chromosome of Drosophila melanogaster

Chromosoma ◽  
1980 ◽  
Vol 81 (2) ◽  
pp. 281-306 ◽  
Author(s):  
E. S. Belyaeva ◽  
M. G. Aizenzon ◽  
V. F. Semeshin ◽  
I. I. Kiss ◽  
K. Koczka ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
X Chromosome ◽  
Cytogenetic Analysis

Cytogenetic analysis of the 2B3-4-2B11 Region of the X chromosome of Drosophila melanogaster

Chromosoma ◽  
1981 ◽  
Vol 84 (2) ◽  
pp. 207-219 ◽  
Author(s):  
E. S. Belyaeva ◽  
I. E. Vlassova ◽  
Z. M. Biyasheva ◽  
V. T. Kakpakov ◽  
G. Richards ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
X Chromosome ◽  
Cytogenetic Analysis

Cytogenetic analysis of the 2B3-4 ? 2B11 region of the X chromosome of Drosophila melanogaster

Chromosoma ◽  
1982 ◽  
Vol 85 (5) ◽  
pp. 659-672 ◽  
Author(s):  
I. F. Zhimulev ◽  
I. E. Vlassova ◽  
E. S. Belyaeva
Keyword(s):  
Drosophila Melanogaster ◽  
X Chromosome ◽  
Cytogenetic Analysis

scholarly journals Suppression of a lethal trisomic phenotype in Drosophila melanogaster by increased dosage of an unlinked locus.

Genetics ◽  
1993 ◽  
Vol 134 (1) ◽  
pp. 243-249 ◽  
Author(s):  
D R Dorer ◽  
M A Cadden ◽  
B Gordesky-Gold ◽  
G Harries ◽  
A C Christensen
Keyword(s):  
Drosophila Melanogaster ◽  
X Chromosome ◽  
Gene Dosage ◽  
Chromosome Region ◽  
Dosage Effect ◽  
Gene Dosage Effect ◽  
Unlinked Locus ◽  
Lethal Phenotype ◽  
The Third ◽  
Dosage Sensitivity

Abstract One of the most extreme examples of gene dosage sensitivity is the Triplo-lethal locus (Tpl) on the third chromosome of Drosophila melanogaster, which is lethal when present in either one or three copies. Increased dosage of an unlinked locus, Isis, suppresses the triplo-lethal phenotype of Tpl, but not the haplo-lethal phenotype. We have mapped Isis to the X chromosome region 7E3-8A5, and shown that the suppression is a gene dosage effect. Altered dosage of Isis in the presence of two copies of Tpl has no obvious effects. By examining the interactions between Isis dosage and Tpl we suggest that Isis does not directly repress Tpl expression, but acts downstream on the triplo-lethal phenotype of Tpl.

Cytogenetic analysis of region 2B3-4-2B11 of the X-chromosome of Drosophila melanogaster

Chromosoma ◽  
1987 ◽  
Vol 95 (4) ◽  
pp. 295-310 ◽  
Author(s):  
E. S. Belyaeva ◽  
M. O. Protopopov ◽  
E. M. Baricheva ◽  
V. F. Semeshin ◽  
M. L. Izquierdo ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
X Chromosome ◽  
Cytogenetic Analysis

scholarly journals CYTOGENETIC ANALYSIS OF CHROMOSOME 3 IN DROSOPHILA MELANOGASTER: THE HOMOEOTIC GENE COMPLEX IN POLYTENE CHROMOSOME INTERVAL 84A-B

Genetics ◽  
1980 ◽  
Vol 94 (1) ◽  
pp. 115-133 ◽  
Author(s):  
Thomas C Kaufman ◽  
Ricki Lewis ◽  
Barbara Wakimoto
Keyword(s):  
Drosophila Melanogaster ◽  
Polytene Chromosome ◽  
Cytogenetic Analysis ◽  
Proximal Portion ◽  
Chromosome 3 ◽  
Gene Complex ◽  
Anterior Portion ◽  
Cytogenetic Evidence ◽  
The Right

ABSTRACT Cytogenetic evidence is presented demonstrating that the 84A-B interval in the proximal portion of the right arm of chromosome 3 is the residence of a homoeotic gene complex similar to the bithorax locus. This complex, originally defined by the Antennapedia (A n t p) mutation, controls segmentation in the anterior portion of the organism. Different lesions within this complex homoeotically transform portions OI the prothorax, proboscis, antenna and eye and present clear analogies to similar lesions within the bithorax locus.

scholarly journals Patterns of DNA Variability at X-Linked Loci in Mus domesticus

Genetics ◽  
1997 ◽  
Vol 147 (3) ◽  
pp. 1303-1316
Author(s):  
Michael W Nachman
Keyword(s):  
Drosophila Melanogaster ◽  
X Chromosome ◽  
House Mouse ◽  
Recombination Rate ◽  
Nucleotide Diversity ◽  
Mus Domesticus ◽  
Substantial Variation ◽  
Intraspecific Polymorphism ◽  
Recombination Rates ◽  
Interspecific Divergence

Introns of four X-linked genes (Hprt, Plp, Glra2, and Amg) were sequenced to provide an estimate of nucleotide diversity at nuclear genes within the house mouse and to test the neutral prediction that the ratio of intraspecific polymorphism to interspecific divergence is the same for different loci. Hprt and Plp lie in a region of the X chromosome that experiences relatively low recombination rates, while Glra2 and Amg lie near the telomere of the X chromosome, a region that experiences higher recombination rates. A total of 6022 bases were sequenced in each of 10 Mus domesticus and one M. caroli. Average nucleotide diversity (π) for introns within M. domesticus was quite low (π = 0.078%). However, there was substantial variation in the level of heterozygosity among loci. The two telomeric loci, Glra2 and Amg, had higher ratios of polymorphism to divergence than the two loci experiencing lower recombination rates. These results are consistent with the hypothesis that heterozygosity is reduced in regions with lower rates of recombination, although sampling of additional genes is needed to establish whether there is a general correlation between heterozygosity and recombination rate as in Drosophila melanogaster.

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