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Friday, May 15, 2020 | History

2 edition of Studies on sex ratio in Drosophila pseudoobscura. found in the catalog.

Studies on sex ratio in Drosophila pseudoobscura.

Bruce Wallace

Studies on sex ratio in Drosophila pseudoobscura.

I. Selection and "sex-ratio."

by Bruce Wallace

  • 216 Want to read
  • 32 Currently reading

Published in [n.p .
Written in English

    Subjects:
  • Drosophila pseudoobscura.,
  • Sex (Biology)

  • Edition Notes

    Other titles"Sex-ratio" in Drosophila pseudoobscura.
    Classifications
    LC ClassificationsQL537.M6 W3
    The Physical Object
    Pagination189-217 p.
    Number of Pages217
    ID Numbers
    Open LibraryOL195418M
    LC Control Numbera 49006737
    OCLC/WorldCa35602915

      We measured temperature-dependent fertility selection on body size in Drosophila pseudoobscura in the laboratory. One hundred single females of each of the three karyotypes involving the ‘sexratio’ (SR) and the standard (ST) gene arrangement on the sex chromosome laid eggs at Cited by: 3. “SEX-RATIO” POLYMORPHISM IN DROSOPHZLA PSEUDOOBSCURA * JAMES W. CURTSINGER1 AND MARCUS FELDMAN Department of Biological Sciences, Stanford University, Stanford, California Manuscript received Ma Revised copy received August IO, ABSTRACT The Sex-ratio chromosome (SR) is a widespread, multiply inverted rear-.

    EXPERIMENTAL AND THEORETICAL ANALYSIS OF THE "SEX-RATIO" POLYMORPHISM IN DROSOPHILA PSEUDOOBSCURA EXPERIMENTAL AND THEORETICAL ANALYSIS OF THE "SEX-RATIO" POLYMORPHISM IN DROSOPHILA PSEUDOOBSCURA James W. Curtsinger and Marcus W. Feldman Department of Biological Sciences, Stanford University, Stanford, . In Drosophila, sex is determined by the proportion of X chromosomes vs. autosomes. A decrease in the proportion of males vs. females, known as sex-ratio, is characteristic to several Drosophila species, and is related to an inversion in the sexual chromosome the so called “sex-ratio” (SR) condition. In this occasion we study the presence of Author: Salceda Víctor M.

    Biology of Drosophila was first published by John Wiley and Sons in Until its appearance, no central, synthesized source of biological data on Drosophila melanogaster was available, despite the fly's importance to science for three decades. Ten years in the making, it was an immediate success and remained in print for two decades. However, original copies are now very hard to find. Read "GEOGRAPHICAL DISTRIBUTION AND CYTOLOGY OF "SEX RATIO" IN DROSOPHILA PSEUDOOBSCURA AND RELATED SPECIES, Genetics" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.


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Studies on sex ratio in Drosophila pseudoobscura by Bruce Wallace Download PDF EPUB FB2

THE SOCIETY FOR THE STUDY OF EVOLUTION VoL II SEPTEMBER, No. 3 STUDIES ON "SEX-RATIO" IN DROSOPHILA PSEUDOOBSCURA. I.1 SELECTION AND "SEX-RATIO" BRUCE WALLACE Columbia University, New York 2 Received INTRODUCTION In several species of Drosophila, nota-bly in the subgenus Sophophora, there exists a genetic condition known as "sex.

Details about Studies on "Sex Ratio" in Drosophila Pseudoobscura. Selection and "Sex-Ratio" Studies on "Sex Ratio" in Drosophila Pseudoobscura. Selection and "Sex-Ratio" Item Information. Condition: Very Good. Price: US $ Book must be returned in the same condition as sent.

All autographs are guaranteed authentic, and if found Seller Rating: % positive. In the early analysis of the "sex-ratio" polymorphism (SR) of Drosophila pseudoobscura, complete meiotic drive was assumed, and study centered on the nature of the selective forces opposing its spread.

Policansky and Ellison () found that the mechanism of SR involved the degeneration of half the spermatids during by: SEX RATIO IN DROSOPHILA PSEUDOOBSCURA Curtsinger and Feldman () and I (Beckenbach ) used other techniques to estimate fitness components and net fitnesses.

Although these fitness estimates could explain the behavior of SR in the corresponding study populations, the fitness estimates of the Studies on sex ratio in Drosophila pseudoobscura.

book studies differed. The population genetics of “sex-ratio” in Drosophila pseudoobscuraCited by:   Gershenson S. A New Sex-Ratio Abnormality in DROSOPHILA OBSCURA. Genetics. Nov; 13 (6)– [Europe PMC free article] [Google Scholar] Sturtevant AH, Dobzhansky T.

Geographical Distribution and Cytology of "Sex Ratio" in Drosophila Pseudoobscura and Related Species. Genetics. Jul; 21 (4)–Cited by:   Cytological investigations of both laboratory and wild "sex ratio" lines of Drosophila pseudoobscura reveal that, contrary to earlier reports, no extra replication of the X chromosome Cited by: VIRILITY DEFICIENCY AND THE SEX-RATIO TRAIT IN DROSOPHILA PSEUDOOBSCURA.

MULTIPLE MATING AND OVERALL VIRILITY SELECTION CHUNG-I WU Institute of Animal Resource Ecology, The University of British Columbia, Vancouver, British Columbia, Canada V6T 1 W5 Manuscript received May 5, Revised copy accepted July 9, ABSTRACT Previous studies Cited by: The sex-ratio trait described in several Drosophila species is a type of naturally occurring X-linked meiotic drive that causes males bearing a sex-ratio X chromosome to produce progenies with a large excess of females.

We have previously reported the occurrence of sex-ratio X chromosomes in Drosophila by: In the D. pseudoobscura population, some males have a harmful chromosome called sex ratio (SR), where an inactive Y-chromosome is transmitted. If an SR male mates with a female, the female will produce only : Drosophilidae.

Hardeland R. Species differences in the diurnal rhythmicity of courtship behaviour within the melanogaster group of the genus Drosophila.

Anim Behav. Feb; 20 (1)– Wu CI. Virility Deficiency and the Sex-Ratio Trait in DROSOPHILA PSEUDOOBSCURA. Sperm Displacement and Sexual Selection.

Genetics. Nov; (3)–Cited by: Prakash S, Merritt RB. Direct evidence of genic differentiation between sex ratio and standard gene arrangements of X chromosome in Drosophila pseudoobscura. Genetics. Sep; 72 (1)– [PMC free article] Sperlich D, Karlik A. The genetic conditions in heterozygous and homozygous populations of Drosophila.

The fate of alien Cited by: The msr trait of Drosophila pseudoobscura occurs when "sex-ratio" males produce a very high frequency of null- X sperm which give rise to sterile male (X/O) progeny.

The trait involves dramatically lowered fecundity due to spermiogenic by: 7. The occurrence of sex-ratio in Drosophila mediopunctata is described. The sex-ratio trait, affected males producing progenies with a large excess of females, is known also in eight other Cited by: Representatives of several currently available spiroplasma serovars were used in feeding and injection experiments involving Drosophila pseudoobscura Cited by: 3.

The Sex-Ratio (SR) phenomenon is associated with the X chromosome of many species of Drosophila. Males carrying SR transmit predominantly sperm bearing the X chromosome.

SR, therefore, has a very significant advantage in segregation. This paper provides. Modifier Genes of the Sex Ratio Trait in Drosophila pseudoobscura Gary Cobbs 1 1 Department of Biology, University of Louisville, Louisville, Kentucky The msr trait of Drosophila pseudoobscura occurs when "sex-ratio" males produce a very high frequency of null- X sperm which give rise to sterile male (X/O) progeny.

6 1 % during the 3 yr between the studies. This unusual phenotype is similar to the “male-sex-ratio” trait stud- ied by NOVITSKI () and VOELKER () in Dro- sophila afinis and thus shall be referred to as “male- sex-ratio” (msr) of D.

pseudoobscuru. The msr trait, so Cited by: 7. Populations ofDrosophila pseudoobscura Frolowa initially polymorphic for the third chromosome gene arrangements Standard (ST) and Chiricahua (CH) were allowed to colonise systems of interconnected cages in which each section was subjected to a different regime of temperature and illumination.

Estimates of gross productivity and migrational tendencies revealed major differences in Cited by: 3. Abstract This study deals with sex-ratio genes tightly linked within the Sex-Ratio inversion. By taking advantage of the fact that the Sex-Ratio chromosome of Drosophila persimilis [SR(B)] is homosequential to the Standard chromosome of D.

pseudoobscura [ST(A)], we carried out two reciprocal introgression by:. Drosophila pseudoobscura allows consideration of the effects of short-term and long-term sex linkage, because a chromosomal fusion has caused a previously autosomal chromosome arm to become part Cited by:   X-linked meiotic drive causing female-biased progenies is known to occur in nine Drosophila species and is called ‘sex-ratio’.

In D. mediopunctata this trait is associated with the X Cited by: A laboratory strain of Drosophila pseudoobscura (L) is studied that, when crossed to sex-ratio homozygous females, produces sons that exhibit varying levels of the male sex-ratio (msr) phenotype.

The msr phenotype occurs only in sex-ratio males and is Author: Gary Cobbs.