Light microscopical studies of chromosomes in embryos of cod, Gadus morhua L. |
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| Authors: | A. Stene |
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| Affiliation: | Institute of Biology and Geology, University of Tromso, P.O. Box 3085, N-9001, Tromso, Norway |
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| Abstract: | The chromosomes in the cells of 1–2-day-old cod embryos were studied using light microscopic techniques. The observations revealed slightly non-synchronous cell divisions, with at least three different mitotic phases present in a 1-day-old embryo. Surprisingly high percentages of abnormal metaphases and anaphases were found in normal-looking embryos. In the 2-day-old embryos, free-lying nuclei were observed in the periblast zone. Chromosome studies of these nuclei revealed a cleavage pattern of the chromosomes which differed from that of the other cells. |
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