AUTORADIOGRAPHY WITH MEIOTIC CHROMOSOMES OF THE MALE NEWT (TRITURUS VIRIDESCENS) USING H3-THYMIDINE
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منابع مشابه
Autoradiography with Meiotic Chromosomes of the Male Newt (triturus Viridescens) Using H3-thymidine.
HE very specialized meiotic events that occur in all sexually reproducing organisms have not been investigated in any great detail by means of high resolution tritium autoradiography. Most of the work so far has been done with animals because of technical difficulties in obtaining uptake of labelled nucleosides in the microsporocytes of plants (TAKATS 1962). LIMA-DE-FARIA (1959, 1961,1962) has ...
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proportions proceeds differentially in the first or in the second and third dimensions. 1 Castle, W. E., Proc. Nat. Acad. Sci., 10, 19-22 and 181-182 (1924). 2 Sumner, F. B., Ibid., 10, 178-180 (1924). Castle, W. E., Carnegie Inst. Pubi., No. 320 (1922). 'Cohen, J. I., Nature, 144 944 (1939). Cohen, J. I., J. Mental Science, 86, No. 362 (1940). 6 Pearl, R., Constitution and Health, London, Kega...
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Among adult vertebrates, only some of the amphibia are capable of regenerating their limbs. Several years ago experiments were begun in an attempt to induce neoplasia in limb tissues capable of such regeneration. The common newt, Triturus viridescens, was used because of its hardiness and availability. The injection of a variety of supposedly carcinogenic substances into the forelimb of over 50...
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QUALITATIVE and quantitative changes which occur in proteins and other macromolecules during differentiation and growth in embryonic development may be detected and defined by immunochemical means (Ebert, 1954, 1959). Similar changes must also occur during regeneration of a part, such as the limb of the salamander, since, after an initial period of cellular breakdown and 'dedifferentiation', re...
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In male Triturus vtdgaris at 16 °C the pre-meiotic synthesis of DNA (5-phase) takes 0-10 days. The 5-phase starts 1-2 days after completion of the ultimate spermatogonial mitosis, and extends into leptotene. Heterochromatic regions, most of which lie close to the centromeres, start and finish replicating about 1 day later than other parts of the chromosomes. Synapsis starts 6 days after the end...
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ژورنال
عنوان ژورنال: Genetics
سال: 1963
ISSN: 1943-2631
DOI: 10.1093/genetics/48.12.1731