Somatic mosaicism in plants with special reference to somatic crossing over
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چکیده
منابع مشابه
Somatic mosaicism in plants with special reference to somatic crossing over
Plant systems in use for the detection of environmental mutagens appear capable of detecting all types of genetic effects which can be studied in animals. The study of somatic mosaicism, however, is better developed in plants than in higher animals. A case is presented here which shows the ability of plant systems in analyzing a host of genetic end points, including chromosome aberrations like ...
متن کاملCurt Stern on Somatic Crossing Over.
In the mid-1930s, Curt Stern was investigating why certain Drosophila mutants develop mosaic patches with different body bristle phenotypes, when he noticed a recurring pattern. In one particular cross, the offspring sometimes carried areas with one recessive phenotype (yellowish-brownish bristles) immediately adjacent to a sector showing a second recessive phenotype (gnarled bristles, known as...
متن کاملSomatic Crossing over in Relationship to Heterochromatin in Drosophila Melanogaster.
OMATIC crossing over, was first demonstrated by STERN (1936) in Drosophila srneZarzogaster, and has since been shown to occur in fungi. From the observation of single and twin mosaic spots in the hypoderm, STERN concluded that the exchanges occur at the four-strand stage, and that the chromatids segregate equationally proximal to the point of exchange and reductionally distal to the point of ex...
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The large number of cell divisions required to make a human body inevitably leads to the accumulation of somatic mutations. Such mutations cause individuals to be somatic mosaics. Recent advances in genomic technology now allow measurement of somatic diversity. Initial studies confirmed the expected high levels of somatic mutations within individuals. Going forward, the big questions concern th...
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THE ACTION OF hfINUTE FACTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 629 Blond-Minute . . . . . . . . , . . . , . . . . . . . . . . , . . . . . . . . . , , , . . , . , . . . . Autosomal Minutes and sex-linked spots. . . . . . . . . . . . . . . . . . . . . . The specificity of the effects of sex-linked and autosomal Minutes. . . . . . . ...
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ژورنال
عنوان ژورنال: Environmental Health Perspectives
سال: 1978
ISSN: 0091-6765,1552-9924
DOI: 10.1289/ehp.782727