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Chromosome study of Anodonta anatina (L., 1758) (Bivalvia, Unionidae)

Pawel Woznicki1, Malgorzata Jankun

  • 1University of Warmia and Mazury in Olsztyn, Department of Evolutionary Genetics, Oczapowskiego 5, 10-718 Olsztyn, Poland. pwozn@uwm.edu.pl

Folia Biologica
|December 9, 2008
PubMed

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In 1882, Flemming observed lampbrush chromosomes (LBC) in salamander eggs. Later in 1892, Rückert observed LBCs in shark egg cells and coined the term "lampbrush chromosomes" because they looked like brushes used to clean kerosene lamps.
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Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also regularly...