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Tetraploid-octoploid relationships and karyological evolution in the order Acipenseriformes (Pisces) karyotypes, nucleoli, and nucleolus-organizer regions in four acipenserid species
The karyotypes of four Acipenseriformes species, Acipenser gueldenstaedti, 2n=250±8, A. ruthenus, A. stellatus and Huso huso, 2n=118±2, are described. In all four karyotypes the majority ofExpand
The selective mortality of different chromosome morphs in Spicara flexuosa Raf.
Out of 1100 species of fishes with known karyotypes, intrapopulation polymorphism is only known in two or three and interpopulation polymorphism in eleven (Vasiliev, 1980). This paper deals with theExpand
Necessity, possibility and sufficiency: legal and didactic problems of attracting practical police officers to conduct classes in higher education institutions of the Ministry of internal Affairs of
В данной статье рассматриваются проблемные вопросы проведения практическими сотрудниками органов внутренних дел различных видов учебных занятий с сотрудниками ОВД (полиции), обучающимися вExpand