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EVOLUTIONARY THEORY

Sex begets sexes

While most species have two sexes, multi-sex systems also occur in nature. The frequency of sexual reproduction is a key parameter to explain how many sexes a species has.

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Fig. 1

Robert Powers

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Correspondence to Sujal S. Phadke.

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Phadke, S.S. Sex begets sexes. Nat Ecol Evol 2, 1063–1064 (2018). https://doi.org/10.1038/s41559-018-0597-0

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