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The adaptive significance of sexuality

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Summary

A theory of sexuality and polymorphism is proposed in which diversity at the molecular level is the adaptive response of multicellular organisms to the challenge of microparasites that have smaller genomes, shorter generation times and which can evolve more quickly than their hosts. The theory has implications for genetically homogenized crops and other cultivated plants as well as for immunology. A different function of sexuality is proposed for microorganisms that reproduce both asexually and sexually. Several possible experimental tests are discussed. Mathematical modelling techniques are outlined qualitatively and compared with game-theoretical methods which may be interpreted as simplifications of population dynamic and genetic equilibria. Some results about equilibria, stability and extinction in the population dynamics of polymorphic host-parasite populations are referenced.

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  1. Department of Biophysics and Medical Physics and Department of Mathematics, University of California, 94720, Berkeley, California, USA

    H. J. Bremermann

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Bremermann, H.J. The adaptive significance of sexuality. Experientia 41, 1245–1254 (1985). https://doi.org/10.1007/BF01952067

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