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Published online by Cambridge University Press: 19 September 2011
This report summarizes the contributions to a symposium held at the VII International Congress of Protozoology in Nairobi. Within the cell cycle of different ciliates, stages and modes controlling cell cycle length are described. In addition, cytoplasmic factors as well as genes related to meiosis are demonstrated. These factors are effective in some unrelated organisms. Several lines of evidence indicate that there is a close connection between the control of meiotic and of mitotic events.