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Germ nuclei in the reproductive tracts of hermaphrodites. The N2 reproductive tract on the bottom shows nuclei in the mitotic phase (1), a transitional phase (2), and the pachytene phase (3). The folt-1 knockout reproductive tract on the top is much smaller, but nuclei in the three phases are present. The nuclei were visualized under epifluorescence after DAPI labeling.
