X-RAY-INDUCED DOMINANT LETHALS IN DROSOPHILA ROBUSTA
نویسندگان
چکیده
منابع مشابه
The frequency-dose relation of x-ray-induced y-suppressed lethals in Drosophila.
E A R L Y in radiation genetic investigations it was reported that X-ray-induced sex-linked recessive lethals were not homogeneous in composition. Instead they included: ( 1 ) apparent intragenic changes without observable cytological abnormalities (point mutations) ; (2) deficiencies; and (3) changes associated with and, for the most part, inseparable from chromosome rearrangements (OLIVER 193...
متن کاملThe production of dominant lethals with X-rays in aged Drosophila melanogaster sperm.
T is a well known fact that many different types of mutations can be proI duced by X-ray treatment. One of these types is called dominant lethals because an individual heterozygous for a mutant of this type dies before reaching maturity. Thus, it can be observed that there is a much higher death rate in the embryonic stage in the F1 progeny from X-rayed Drosophila melanogaster flies as compared...
متن کاملFrequency of Dominant Lethals Induced by Radiation in Sperms of Drosophila Melanogaster.
HE proportion of the eggs laid by Drosophila females that fail to develop T into adult flies is increased when the sperms used in fertilizing the females have been previously treated with ionizing radiation. It is generally believed that these induced failures of development are due to “dominant-lethal” changes in the genetic material of the treated sperms. These changes have been visualized al...
متن کاملFrequency of "Cell-Lethals" among Lethals Obtained at Random in the X-Chromosome of Drosophila Melanogaster.
84 per cent albite and we know enough of relations in our general system (Fig. 1) to be able to say that the conditions are similar in mixtures with an excess of silica (simplified fayalite-rhyolites) and also in those with a deficiency of silica (simplified fayalite-phonolites). While we have made only a first step in the investigation of these extreme liquids it is plain from the results of t...
متن کاملOn cell lethals in Drosophila.
Somatic crossing over in flies heterozygous for a dominant Minute mutant may result in two cells, homozygous for wild type and Minute, respectively. If both cells took part in development, a twin spot of two genotypes, different from the rest of the body, would result. Two-hundred wild type spots were found, none of which was accompanied by an adjacent twin spot homozygous for Minute. The absen...
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ژورنال
عنوان ژورنال: Genetics
سال: 1954
ISSN: 1943-2631
DOI: 10.1093/genetics/39.4.558