Abstract
IT has been the general practice to speak of the chromosomes shown in the metaphase plates in the root-tips (and other somatic tissues) of flowering plants as single chromosomes. They are never, it seems, called bivalents, dyads, or disomes; though they always show a fine longitudinal split distinctly, in correctly fixed preparations. The chromosomes of the late prophase and first metaphase of the maturation divisions in flowering plants have, in my opinion, a close parallelism to those of the somatic divisions; in that the two chromatids of any one of the two homologous chromosomes are rendered visible only through the appearance of a fine longitudinal split, seen in correctly fixed preparations.
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BELLING, J. Multiple Chromosomes and Reduction Division in Flowering Plants. Nature 119, 122 (1927). https://doi.org/10.1038/119122a0
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DOI: https://doi.org/10.1038/119122a0
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