The cell in development and inheritance . hat this act of division must be referred to the fission of thechromatin-granules or chromomeres of which the chromatin-threadis built. These granules were first clearly described by Balbianii^J^^ in the chromatin-network of epithelial cells in the insect-ovary, and he found that the spireme-thread arose by the lineararrangement of these granules in a single row like a chain of bacte-ria.^ Six years later Pfitzner (82) added the interesting discovery 1 87, p. 279. p. 113. 3 See 81, p. 638. THE MECHANISM OF MITOSIS 113 that during the mitosis of various
The cell in development and inheritance . hat this act of division must be referred to the fission of thechromatin-granules or chromomeres of which the chromatin-threadis built. These granules were first clearly described by Balbianii^J^^ in the chromatin-network of epithelial cells in the insect-ovary, and he found that the spireme-thread arose by the lineararrangement of these granules in a single row like a chain of bacte-ria.^ Six years later Pfitzner (82) added the interesting discovery 1 87, p. 279. p. 113. 3 See 81, p. 638. THE MECHANISM OF MITOSIS 113 that during the mitosis of various tissue-cells of the salamander, thegranules of the spireme-thread divide by fission and thus determine thelongitudinal splitting of tJie etitije chromosome. This discovery wasconfirmed by Flemming in the following year (82, p. 219), and a simi-lar result has been reached by many other observers (Fig. 54). Thedivision of the chromatin-granules may take place at a very earlyperiod. Flemming observed as long ago as 1881 that the chromatin-.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectcells, bookyear1902
