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.
Austin et al. BMC Developmental Biology 2010 10:46 doi:10.1186/1471-213X-10-46