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Figure 13 and 14.

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Developing and mature oocytes in C. metoecus. (13) General observation of a developing oocyte. Note the presence of synaptonemal complexes indicating the zygotene-pachytene stage of the first meiotic division. Inset: detail of a synaptonemal complex. Scale bar = 2 μm. (14) General observation of a fully mature germ cell, with a low nucleo-cytoplasmic ratio. Cortical granules are at the periphery of the cell, and a chromatoid body is surrounded by clusters of mitochondria in the cytoplasm. Nuclear vacuoles are observed in the nucleolus. Scale bar = 2 μm. CB: chromatoid body; CG: cortical granule; GER: granular endoplasmic reticulum; M: mitochondrion; Nl: nucleolus; Nv: nuclear vacuole; SC: synaptonemal complex.

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