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Heteromorphic sex chromosomes in the ninespine stickleback Pungitius pungitius

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Specimens from two freshwater populations of the ninespine stickleback Pungitius pungitius in Poland showed morphologically differentiated sex chromosomes. A heteromorphic pair of chromosomes appeared only in male diploid cells. The Y chromosome was the largest chromosome in the P. pungitius karyotype.

Keywords: Gasterosteidae; cytogenetics; evolution; freshwater fish; heterogamety; sex determination

Document Type: Research Article


Affiliations: Department of Ichthyology, University of Warmia and Mazury in Olsztyn, 10-957 Olsztyn, Poland

Publication date: 2008-08-01

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