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Synkaryon formation during conjugation of Paramecium caudatum. The diagram shows the changes in the micronucleus when cells of complementary mating types (O‐type and E‐type) mate. Micronuclei undergo meiosis in both cells, eventually resulting in two haploid (n) nuclei in each cell. One of them is exchanged with the partner cell, and the nuclei fuse to form a diploid (2n) synkaryon. A circle with an X inside indicates a degenerating nucleus
