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Aberrant sperm cyst from a heat-treated hs-zip male. Two ends of the same elongated, pre-individualized sperm cyst. (A) Spermatid nuclei are normally all apically located in a bundle of nuclei (arrowhead). Abnormal spermatid nuclei are also seen scattered along the length of the cyst (A, arrows). Abnormal spermatid nuclei are less needle-like farther from the apical nuclei bundle (B, arrows). ccn, cyst cell nuclei. Bar, 10 μm.
