The cell in development and inheritance . emann, and Galeotti have especially pointed out,that they are of frequent occurrence in abnormal growths such ascancers and tumours. The abnormal forms of mitoses are arranged by Hansemann in twogeneral groups, as follows: (i) asymmetrical mitoses, in which thechromosomes are unequally distributed to the daughter-cells, and (2)multipolar mitoses, in which the number of centrosomes is more than 98 CELL-DIVISION two, and more than one spindle is formed. Under the first group areincluded not only the cases of unequal distribution of the daughter-chromosom
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The cell in development and inheritance . emann, and Galeotti have especially pointed out, that they are of frequent occurrence in abnormal growths such ascancers and tumours. The abnormal forms of mitoses are arranged by Hansemann in twogeneral groups, as follows: (i) asymmetrical mitoses, in which thechromosomes are unequally distributed to the daughter-cells, and (2)multipolar mitoses, in which the number of centrosomes is more than 98 CELL-DIVISION two, and more than one spindle is formed. Under the first group areincluded not only the cases of unequal distribution of the daughter-chromosomes, but also those in which chromosomes fail to be drawninto the equatorial plate and hence are lost in the cytoplasm. Klebs first pointed out the occurrence of asymmetrical mitoses incarcinoma-cells, where they have been carefully studied by Hanse-mann and Galeotti. The inequality is here often extremely marked, so that one of the daughter-cells may receive more than twice asmuch chromatin as the other (Fig. 46). Hansemann, whose conclu-.