Results 141 to 150 of about 4,326 (173)

Fine-Scale Crossover Rate Heterogeneity in Drosophila pseudoobscura

Journal of Molecular Evolution, 2006
Broad-scale differences in crossover rate across the genome have been characterized in most genomes studied. Fine-scale differences, however, have only been examined in a few taxa, such as Arabidopsis, yeast, humans, and mice. No prior studies have directly looked for fine-scale recombination rate heterogeneity in Drosophila. We produced 370 Drosophila
Elizabeth T, Cirulli, Richard M, Kliman, Mohamed A F, Noor   +2 more
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Genetic Studies in Drosophila Pseudoobscura

1943
No abstract.
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Analysis of a swallow homologue from Drosophila pseudoobscura

Development Genes and Evolution, 2000
We analyzed a functional homologue of the swallow gene from Drosophila pseudoobscura. The swallow gene of D. melanogaster plays an essential role in localizing bicoid mRNA in oocytes, and swallow mutant embryos show anterior pattern defects that result from the lack of localization of the bicoid morphogen.
Z, Huang, N J, Pokrywka, J H, Yoder, E C, Stephenson   +3 more
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Drosophila pseudoobscura SUBGROUP

Published as part of Grimaldi, David A., 2024, The Drosophila (Sophophora) obscura species group in the Americas (Diptera: Drosophilidae): review, revisions, and three new species, pp. 1-44 in American Museum Novitates 2024 (4015) on page 32, DOI: 10.1206/4015.1, http://zenodo.org/record ...
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"Sex Ratio" in Drosophila pseudoobscura : Spermiogenic Failure

Science, 1970
Contrary to earlier reports, testes of "sex ratio" Drosophila pseudoobscura males have only half as many sperm per bundle as testes of normal males do. This fact, determined from electron micrographs, indicates that the functional pole hypothesis is not applicable to the action of "sex ratio."
D, Policansky, J, Ellison
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Sex-Ratio Polymorphism in Drosophila pseudoobscura

The American Naturalist, 1991
I studied "sex-ratio" (SR) genotype frequencies in two populations of Drosophila pseudoobscura from southeastern Arizona: Bear Creek Canyon and Tucson. Wild-inseminated females were collected, their fecundities measured in the laboratory, and their SR genotypes inferred by cytological analysis of their progenies.
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Drosophila (Sophophora) pseudoobscura Frolova 1929

Drosophila (Sophophora) pseudoobscura Frolova Figures 3C, 8E, 10E Drosophila pseudoobscura Frolova, in Frolova and Astaurov, 1929: 212. Drosophila pseudoobscura bogotana Ayala and Dobzhansky, 1974: 216. DIAGNOSIS: Facial carina broad, edge flat; acrostichal setae in 8 rows; sex comb with usually 6–7 teeth on ta1 (range of 5–8), usually 5 on
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Sexual Isolation between Drosophila persimilis and Drosophila pseudoobscura

The American Naturalist, 1954
Sexual isolation between the closely related species, D. persimilis and D. pseudoobscura, was studied by means of male multiple "choice" tests, female multiple "choice" tests, and multiple "choice" experiments involving the males and females of both species.
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Tissue localization of esterase-5 in Drosophila pseudoobscura

Biochemical Genetics, 1983
Disc gel electrophoresis of dissected adults of Drosophila pseudoobscura showed that most of the esterase-5 activity was in the head (36%) and thorax (51%), with little activity in the abdomen (13%). No activity was found in digestive tissues, reproductive tissues, or nervous tissues.
A J, Lunday, J L, Farmer
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Evolutionary Oscillations in Drosophila pseudoobscura

1971
In his masterwork Ecological Genetics, Ford (1964) wrote: ‘One of the most far-reaching results of recent work on ecological genetics is the discovery that unexpectedly great selective forces are normally operating to maintain or to adjust the adaptations of organisms in natural conditions ...
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