Meiosis in the Djungarian hamster

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Abstract
Polyploid spermatocytes were found in air-dried meiotic preparations of 8 of 10 adult males of the Djungarian hamster (Phodopus sungorus campbelli Thomas). Most of them were tetraploid spermatocytes I or diploid spermatocytes II, but cells of higher ploidy have also been found. It is argued that polyploid spermatocytes are not artifacts and that the most probable cause of their formation is fusion of cells at pachytene and soon after metaphase I.

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