A NEW SEX-RATIO ABNORMALITY IN DROSOPHILA OBSCURA
نویسندگان
چکیده
منابع مشابه
Morphometrical evolution in a Drosophila clade: the Drosophila obscura group
Five morphometrical traits (wing and thorax length, ovariole number, and thoracic and female abdomen pigmentation) were investigated in laboratory stocks of 20 species belonging to the Drosophila obscura group (subgenus Sophophora). These species originated from four biogeographical regions and represent all five of the presently recognized, taxonomic subgroups. Size-related traits (wing and th...
متن کاملPreliminary characterization of "sex ratio" and rediscovery and reinterpretation of "male sex ratio" in Drosophila affinis.
In D. affinis "sex ratio" (sr), a form of meiotic drive characterized by the production of mostly or only female progeny by certain males, is associated with two different X chromosome sequences, XS-I XL-II and XS-II XL-IV. The behavior of the two sequences differed, depending on the Y chromosome constitution, being either Y(L) or 0. Males with sequence XS-II XL-IV and Y(L) produced progenies w...
متن کاملX-Ray Effects on Drosophila Pseudo-Obscura.
In order to procure new material for the study of problems connected with the non-disjunction of the sex chromosomes in Drosophila pseudoobscura, a series of X-ray experiments was carried out. Among the species of Drosophila,pseudo-obscura is distinguished by the length of itsxchromosome, whose genetic map is the longest recorded in any species (LANCEFIELD 1922). The work of LANCEFIELD has made...
متن کاملModifier Genes of the Sex Ratio Trait in Drosophila pseudoobscura.
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 failure. The msr trait is multigenic and the genes are located on autosomes II, III and IV of the L116 laboratory stock. This stock also carries genes on the Y ch...
متن کاملSex - ratio in natural populations of Drosophila mediopunctata ( Diptera : Drosophilidae
The sex-ratio trait has been described as the production of progenies with unequal sexual proportions induced by meiotic drive. In Drosophila, meiotic drive of the X chromosome against the Y (yielding female biased progenies) is known in several species, including in Drosophila mediopunctata. This species has been previously studied, and the chromosome mechanism of the meiotic drive in sex-rati...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Genetics
سال: 1929
ISSN: 1943-2631
DOI: 10.1093/genetics/14.1.127