BREAKAGE OF CHROMOSOMES IN Tradescantia WITH A CALCIUM DEFICIENCY
نویسندگان
چکیده
منابع مشابه
Induction of Chromosome Breakage at Meiosis by a Magnesium Deficiency in Tradescantia.
designated C115 and C117, are inherited as gene differences. C115 and mi-3 both have an excess of cytochrome c but not as great as in poky and both, like poky, are deficient in cytochrome a. The content of cytochrome b is normal in mi-3 and low in C15 but not as low as in poky. Cytochromes a and c have not been detected in C117 but there is an excess of cytochrome b. The three strains grow more...
متن کاملSegmental Interchange in Chromosomes of Tradescantia.
Chromosome ring formation has been found in a number of difierent genera. In certain species of Oenothera and of Hypericum and in the monotypic genus Rhoeo, all the chromosomes may be united in a single ring or chain a t meiosis. Ring formation is maintained in these plants by a system of balanced lethals. In Datura, Zea, Pisum and Campanula rings of four or more chromosomes have been described...
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Meiosis is a special cell division program that reduces the diploid chromosome set to a haploid set for sexual reproduction. Reductional segregation of homologous chromosomes is helped by physical linkages (crossovers) provided by recombina-tion. A long-standing problem in biology has been to understand how meiotic recom-bination is controlled, since its initiation by DNA double-strand breaks (...
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چکیده ندارد.
15 صفحه اولThe Relative Effects of X-Rays, Gamma Rays and Beta Rays on Chromosomal Breakage in Tradescantia.
OR some time it has been generally considered that the production of F chromosomal aberrations in Tradescantia and many other materials is essentially independent of the wave length of the exciting radiation in the region shorter than 1.5 A. This view has not been seriously questioned in recent years and to date has remained one of the fundamental tenets of radiobiology. A number of isolated in...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1955
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.41.3.155