Somatic pairing, endomitosis and chromosome aberrations in snakes (Viperidae and Colubridae)
نویسندگان
چکیده
منابع مشابه
Somatic pairing, endomitosis and chromosome aberrations in snakes (Viperidae and Colubridae).
The positioning of macrochromosomes of Bothrops jararaca and Bothrops insularis (Viperidae) was studied in undistorted radial metaphases of uncultured cells (spermatogonia and oogonia) not subjected to spindle inhibitors. Colchicinized metaphases from uncultured (spleen and intestine) and cultured tissues (blood) were also analyzed. We report two antagonic non-random chromosome arrangements in ...
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The venoms extracted from a colubrid snake [Malpolon monspessulanus (Hermann)], seven viperids [Montivipera xanthina (Gray), Montivipera wagneri Nilson &Andrén, Vipera ammodytes (Linnaeus), Vipera kaznakovi (Nikolsky), Vipera eriwanensis (Bonaparte), Vipera barani Böhme & Joger, Macrovipera lebetina (Linnaeus)] and an elapid snake [Walterinnesia aegyptia (Lataste)] collected from various region...
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Comparative morphology of the skin of Natrix tessellata (family: Colubridae) and Cerastes vipera (family: Viperidae).
We studied beneficial difference of the skin of two snakes. Two snakes were chosen from two different habitats and two families: Colubridae (Natrix tessellata) and Viperidae (Cerastes vipera). The investigations were performed by light and electron microscopy. Histologically, the skin of the studied species show pronounced modifications that correlated with functional demands. The scales in Nat...
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A review of currently available data on in vivo induced chromosome damage in the blood lymphocytes of astronauts proves that, after protracted exposure of a few months or more to space radiation, cytogenetic biodosimetry analyses of blood collected within a week or two of return from space provides a reliable estimate of equivalent radiation dose and risk. Recent studies indicate that biodosime...
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ژورنال
عنوان ژورنال: Anais da Academia Brasileira de Ciências
سال: 2003
ISSN: 0001-3765
DOI: 10.1590/s0001-37652003000300004