CYTOGENETIC STUDIES OF X-RAY AND INGESTED P32 INDUCED SEX-LINKED RECESSIVE LETHALS IN DROSOPHILA MELANOGASTER
نویسندگان
چکیده
منابع مشابه
Studies on the Sex - Specific Lethals of Drosophila Melanogaster
Mutants at three male-specific lethal loci of Drosophila melanogaster (mle, m ~ l 2 ~ ' and mle(31132) were examined by gynandromorph analysis. In all cases only a very few gynandromorphs with small X/O patches appeared. Most of these small X/O patches were in the abdomen, and the structures in these X / O regions were reduced in size. These results indicate that the primary effects of these mu...
متن کاملThe distribution of randomly recovered X-ray-induced sex-linked genetic effects in Drosophila melanogaster.
Cytogenetic analysis of more than 1500 randomly recovered lethal X chromosomes derived from 2000 and 3000 r X-ray exposures of post-meiotic male germ cells has made possible a plot of the distribution in different regions of the X chromosome of: (1) gene mutations associated with cytologically normal chromosomes, (2) mutations associated with chromosomal rearrangement breakpoints, (3) deficienc...
متن کاملSpontaneous Mutation Rates for Sex-Linked Lethals in the Two Sexes of DROSOPHILA MELANOGASTER.
HE spontaneous mutation rates for autosomal lethals (both second and third chromosomes) in both male and female Drosophila melanogaster were reported in an earlier study (WALLACE 1968). Nearly 12.000 gametes obtained from lethal-free individuals were tested; the proportion of lethal-bearing ones was approximately 0.006 for either autosome and for either sex. The finding that the mutation rates ...
متن کاملPrenatal sex determination in suspicious cases of X-linked recessive diseases by the amelogenin gene
Objective(s):To determine the fetal discernment in suspected cases of sex linked recessive disease in the first trimester of pregnancy. Materials and Methods: After collection of 100 Chorionic Villi samples, the DNAs were extracted and baby gender was determined. Meanwhile, after increasing the sensitivity, the system was able to detect the sex of each cell which was obtained by biopsy. Resul...
متن کاملX-ray Induced Sex-linked Lethal and Detrimental Mutations and Their Effect on the Viability of Drosophila Melanogaster.
T H E first attempts to analyze the distribution and frequency of detrimental mutations induced by radiation were made simultaneously but independently by TIMOFEEFF-RESSOVSKY ( 1935) and KERKIS (1935). They came to essentially the same conclusion: that detrimentals were induced two to three times as frequently as lethals. More recently, interest in this problem has been renewed (KFER 1952; BONN...
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ژورنال
عنوان ژورنال: Hereditas
سال: 2009
ISSN: 0018-0661
DOI: 10.1111/j.1601-5223.1962.tb01801.x