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- W1941502008 abstract "ABSTRACT A meiotic technique for visual detection of translocations has been applied to ten mitotically identified interchanges, and three new translocations were discovered using this method. Testcrosses between standard strains and potential translocation strains—e.g. strains with newly induced mutants or descendants from translocation crosses—are inspected for the frequency of abnormal-looking colonies. In all heterozygous translocation crosses abnormals are increased at least tenfold compared to the average control level of 0.15%. Most of these are disomics, and can be recognized by their characteristic phenotypes. Each translocation produces a few specific types, since nondisjunction is increased mainly in the linkage groups involved in the translocation (50–100-fold over control values). Therefore, translocations were not only detected but often tentatively assigned to linkage groups from the analysis of the disomic progeny in crosses. In addition, this technique allows reciprocal and nonreciprocal translocations to be distinguished, since only the latter produce one-third phenotypically abnormal duplication progeny. While results are clearcut in most cases, occasionally problems are encountered, e.g. when morphological mutants segregate in crosses, or when other genetic factors which increase or reduce the frequency of nondisjunction are present in certain strains." @default.
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- W1941502008 date "1974-01-01" @default.
- W1941502008 modified "2023-09-23" @default.
- W1941502008 title "DETECTION AND IDENTIFICATION OF TRANSLOCATIONS BY INCREASED SPECIFIC NONDISJUNCTION IN ASPERGILLUS NIDULANS" @default.
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- W1941502008 doi "https://doi.org/10.1093/genetics/76.1.19" @default.
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