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The association of non-homologous parts of chromosomes in the mid-prophase of meiosis in zea mays

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Summary

  1. 1.

    Association of chromosomes at pachytene in Zea mays is 2-by-2 whether or not the parts associated are homologous.

  2. 2.

    Evidence for non-homologous association of parts of chromosomes has been obtained from monoploids, diploids, monosomics, trisomics, deficiencies, inversions, translocations, ring-shaped chromosomes, “asynaptic” plants and so-called “B-type” chromosomes.

  3. 3.

    In many cases, the non-homologous association at pachytene appears to be as intimate as homologous association.

  4. 4.

    Non-homologous association, present at pachytene, rarely continues into diakinesis.

  5. 5.

    Translocations probably result from the association of non-homologous parts of chromosomes.

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Authors and Affiliations

  1. University of Missouri, Missouri, USA

    Barbara McClintock

  2. California Institute of Technology, California, USA

    Barbara McClintock

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  1. Barbara McClintock
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Additional information

With 51 figures in the text and plates VII–XII.

National Research Council Fellow in the biological Sciences.

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McClintock, B. The association of non-homologous parts of chromosomes in the mid-prophase of meiosis in zea mays. Z.Zellforsch 19, 191–237 (1933). https://doi.org/10.1007/BF02462870

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  • DOI: https://doi.org/10.1007/BF02462870

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