Micronuclei and nuclear abnormalities in peripheral blood erythrocytes of penguins "Pygoscelis papua". "A, C, D" – “budding” nuclei; "B" – partly fragmented nucleus with chromosome bridge (double bridge). Blood samples were made by Assist. Prof. Dr. Vladimir Bezrukov, Taras Shevchenko National University of Kyiv, in 2003-2004 during VIII Ukrainian Antarctic expedition (Gentoo Penguin Colony, Petermann island, 65°10'S, 64°10'W).