Journal of Genetics

, Volume 58, Issue 2, pp 237–242 | Cite as

Polymorphism due to selection of varying direction

  • J. B. S. Haldane
  • S. D. Jayakar


In a large random mating population segregating for a pair of allelomorphs with full dominance, the condition that neither allelomorph should disappear is that the arithmetic mean of the fitnesses of recessives in different generations should exceed unity, their geometric mean fall below it.


Pollen Tube Relative Fitness Meiotic Drive Spring Generation Random Mating Population 
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  1. Haldane, J. B. S. (1924). A mathematical theory of natural and artificial selection, Part I.Trans. Camb. Phil. Soc.,23, 19–41.Google Scholar
  2. Fisher, R. A. (1922). On the dominance ratio.Proc. Roy. Soc. Edin.,42, 321–341.Google Scholar

Copyright information

© Indian Academy of Sciences 1963

Authors and Affiliations

  • J. B. S. Haldane
    • 1
  • S. D. Jayakar
    • 1
  1. 1.Genetics and Biometry LaboratoryGovernment of OrissaBhubaneswar

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