Why are there only two sexes?

@article{Hurst1996WhyAT,
  title={Why are there only two sexes?},
  author={L. Hurst},
  journal={Proceedings of the Royal Society of London. Series B: Biological Sciences},
  year={1996},
  volume={263},
  pages={415 - 422}
}
  • L. Hurst
  • Published 1996
  • Biology
  • Proceedings of the Royal Society of London. Series B: Biological Sciences
  • Populations of most isogamous protists have gametes that belong to one of only two mating-types (alias sexes). That this should be so is paradoxical for, if there is any cost involved in the finding of a mate, then a gamete of a third mating-type would, at the point of invasion, be able to mate with the first gamete it encounters, hence suffering the minimum possible costs. The expectation is hence that the number of mating-types in most isogamous species should tend towards infinity. By the… CONTINUE READING
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