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G- and C-band karyotypes of the harvest mouse, Micromys minutus

✍ Scribed by U. Jüdes

Publisher
Springer Netherlands
Year
1981
Tongue
English
Weight
223 KB
Volume
54
Category
Article
ISSN
0016-6707

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✦ Synopsis

Chromosomes of Micromys minutus (2n = 68) were studied by G-and C-banding. They are characterized by one large metacentric chromosome with only a small amount of centromeric constitutive heterochromatin. All other, acrocentric, chromosomes have large centromeric heterochromatic blocks, which seem to differ in size between individuals. (Schleswig-Holstein, W.-Germany) in autumn 1978. Since the females were pregnant, seven embryos were used for tissue culture (culture medium McCoy .5A t 10% fetal calf serum t additional Glumatin t Streptomycin t Refobacin) and subsequent chromosome preparations. Modified G-banding was performed according to the method of Seabright (1972); C-banding after Sumner (1972).

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Pokeweed Mitogen and Phytohaemagglutinin were found to stimulate the bone marrow cells of sick domestic pigs (Sus scrofa) while having no effect on healthy pigs. The mitotic chromosomes of the pig are described with particular reference to centromeric heterochromatin distribution and nucleolar organ