Time lapse movie of meiotic metaphase and anaphase in spermatocytes of the Locust Psophus stridulus. Two sequences are shown, each continuing through telophase to the start of cytokinesis. In addition to the squat meiotic chromosomes, the spindles are clearly visible. This is a historic movie made in the early 40s by Kurt Michel of the Zeiss company in Jena using Zernike's newly invented phase contrast microscope. Despite its early date, the movie and the others in the group remain some of the clearest examples of chromosome behavior during meiosis.
The movie was originally recorded on 35mm film, and later transferred to CD format. The text at the beginning of the movie translates approximately as follows: Meiosis division I Metaphase ( ca. 9-10 hr) and Anaphase (ca. 1-2 hr) ----------------------- Based on the duration, it appears the movie represents an increased speed of ca. 50x. See also: Michel, K. (1941): Die Darstellung von Chromosomen mittels des Phasenkontrastverfahrens. Die Naturwissenschaften 29, 61-62 Michel, K. (1958): Die Reifeteilungen (Meiose) bei der Spermatogenese der Schnarrheuschrecke (Psophus stridulus l.) Institut für den Wissenschaftlichen Film, Göttingen
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