Centriole and centrosome cycle in the early Drosophila embryo

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Abstract
Centriole and centrosome cycles were examined by indirect immunofluorescence and electron microscopy techniques in the early Drosophila embryo. The centrosomes, which are already divided at interphase, appear as compact spheres during prophase and metaphase, expand and flatten from anaphase to telophase and split into two units in late telophase. Centriole separation starts in late metaphase, becomes evident in anaphase and increases during telophase. Procentrioles appear during the following interphase.