Orientation, Arrangement and Association of Somatic Chromosomes

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Abstract
The presence or absence of prophase orientation of chromosomes, specific arrangement of homologous chromosomes, somatic chromosome association and the doubleness of anaphase chromatids were analyzed, using root-tips of Crepis capillaris and young endosperm tissues of Aegilops squarrosa. Chromosomes were found oriented at their kinetochore regions throughout prophase, and homologous chromosomes were found in side-by-side arrangement throughout the cell generations. Association of homologous chromosomes was found in the late telophase of mitosis in Crepis capillaris. The double structure of mitotic anaphase chromatids was clearly observed in Crepis.

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