MOSAICISM IN HABROBRACON JUGLANDIS ASSOCIATED WITH THE EBONY LOCUS
نویسندگان
چکیده
منابع مشابه
Mosaicism in Habrobracon juglandis associated with the ebony locus.
MONG species of insects that have been used for genetic studies, there Aoccasionally appear adults which are composed of two or more different genomes. In Drosophila melanogaster, where most of these mosaics were of the gynandromorph type, it has been shown that elimination of an X chromosome during early cleavage was involved (MORGAN and BRIDGES 1919; PATTERSON 1931). In a few instances, ferti...
متن کامل[Pleiotropism of wh and el locus in Habrobracon juglandis].
The two autonomously manifesting mutations, eyeless (el) and white eyes (wh), of Habrobracon juglandis were compared phenotypically with the wild-type. Eyeless reduces the compound eyes in size. The penetrance is 100%, while expressivity ranges from point-shaped ommochrome crumbs over individual facets to a small eye with abundant facets. There is no correlation between the sizes of left and ri...
متن کاملEvidence for post-cleavage fertilization among mosaics in Habrobracon juglandis.
Habrobracon females homozygous for the mutant ebony produce about 5% mosaic progeny among fertilized eggs. The present experiment demonstrates by means of a test-cross method that in the production of these mosaics only one pronucleus is involved, and that this nucleus cleaves before union of one of its daughter nuclei with the sperm nucleus.
متن کاملIncreased production of genetic mosaics in Habrobracon juglandis by cold shock of newly oviposited eggs.
Eggs from an ebony stock exposed to 5-5 degrees C prior to syngamy exhibited increased production of genetic mosaics in comparison with untreated eggs from the same females. No increase in mosaic production occurred for cold-shocked cleavage-stage embryos from the ebony stock or from pre-cleavage cold-shocked eggs from a wild-type stock. Heat shock of pre-syngamy eggs also failed to increase th...
متن کاملAn analysis of radiation-induced variation on body-weight of Habrobracon juglandis.
use of irradiation has long been proved to be effective in inducing new T z n e t i c variability in a quantitative trait. SCOSSIROLI (1954) irradiated D ~ o sophila mlanogaster populations that had ceased to respond to selection for sternopleural bristle. The irradiated populations now responded to further selection: the response to upward selection was remarkably high, while that to downward ...
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ژورنال
عنوان ژورنال: Genetics
سال: 1968
ISSN: 1943-2631
DOI: 10.1093/genetics/58.3.415