Abstract
The ultrastructure of moving amphitelic sex chromosomes during anaphase of the first meiotic division of spermatocytes was studied by means of serial sections. The chromosomes have radial lamellae-like projections at their surface running in the direction of the spindle axis. Parallel spindle microtubules lie between these lamellae. The kinetochoral region pointing to the interzone (KIZ) is stretched, while the kinetochore pointing polewards (Kp) is flat. It is suggested that the importance of the poleward kinetochore as an application site for pulling forces during anaphase movement is possibly reduced in favour of the lamellaemicrotubule association at the periphery of the chromosome. Distal parts of kinetochoral tubules of KIZ may be associated with the lamellae of the partner sex chromosome. This arrangement may have some additional importance for the synchronization of sex chromosome migration in anaphase.
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Bauer, H., Dietz, B., Röbbelen, C.: Die Spermatocytenteilungen der Tipuliden. III. Das Bewegungsverhalten der Chromosomen in Translokationsheterozygoten von Tipula oleracea. Chromosoma (Berl.) 18, 116–189 (1961).
Behnke, O., Forer, A.: Some aspects of microtubules in spermatocyte meiosis in a crane fly (Nephrotoma suturalis Loew): Intranuclear and intrachromosomal microtubules. C.R. Lab. Carlsberg 35, 437–455 (1966).
Bikle, D., Tilney, L. G., Porter, K. R.: Microtubules and pigment migration in the melanophores of Fundulus heteroclitus. Protoplasma (Wien) 61, 322–345 (1966).
Carlson, J. G.: Some effects of X-radiation on the neuroblast chromosomes of the grasshopper, Chortophaga viridifasciata. Genetics 23, 596–609 (1938).
Dietz, R.: Die Spermatocytenteilungen der Tipuliden. II. Mitt. Graphische Analyse der Chromosomenbewegung während der Prometaphase I im Leben. Chromosoma (Berl.) 8, 183–211 (1956).
Dietz, R.: Bau und Funktion des Spindelapparates. Naturwissenschaften 56, 237–248 (1969).
Dietz, R.: Die Assembly-Hypothese der Chromosomenbewegung und die Veränderungen der Spindellänge während der Anaphase I in Spermatocyten von Pales ferruginea (Tipulidae, Diptera). Chromosoma (Berl.) 38, 11–76 (1972).
Fuge, H.: Spindelbau, Mikrotubuliverteilung und Chromosomenstruktur während der I. meiotischen Teilung der Spermatocyten von Pales ferruginea. Eine elektronenmikroskopische Analyse. Z. Zellforsch. 120, 579–599 (1971).
Fuge, H., Müller, W.: Mikrotubuli-Kontakt an Anaphasechromosomen in der I. meiotischen Teilung. Exp. Cell Res. 71, 241–245 (1972).
Gibbons, I. R., Rowe, A. J.: Dynein: A protein with adenosine triphosphate activity from cilia. Science 149, 424–426 (1965).
Müller, W.: Elektronenmikroskopische Untersuchungen zum Formwandel der Kinetochoren während der 1. und 2. meiotischen Teilung der Spermatoeyten von Pales ferruginea (Nematocera). Chromosoma (Berl.) 38, 139–172 (1972).
Tucker, J. B.: Microtubule-arms and propulsion of food particles inside a large feeding organelle in the ciliate Phascolodon vorticella. J. Cell Sci. 10, 883–903 (1972).
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Fuge, H. Morphological studies on the structure of univalent sex chromosomes during anaphase movement in spermatocytes of the crane fly Pales ferruginea . Chromosoma 39, 403–417 (1972). https://doi.org/10.1007/BF00326175
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DOI: https://doi.org/10.1007/BF00326175