Ambidirectional_dominance

Ambidirectional dominance

Ambidirectional dominance

Add article description

Ambidirectional dominance occurs in a situation where multiple genes influence a phenotype and dominance is in different directions depending on the gene. For example, for gene A increased height is dominant, while for gene B decreased height is dominant. The opposite situation, where all genes show dominance in the same direction, is called directional dominance.[1] In the same example, for both genes A and B increased height is dominant. According to Broadhurst, ambidirectional dominance is the result of stabilising selection in the evolutionary past.[1] Ambidirectional dominance has been found for exploratory behaviours in mice[2][3][4] and paradise fish.[5]

References

  1. [1]
    Broadhurst, PL; Jinks, JL (1974). "What genetical architecture can tell us about the natural selection of behavioural traits". In van Abeelen, JHF (ed.). The Genetics of Behaviour. Amsterdam: North Holland. pp. 43–63. ISBN 0-7204-7137-0. OCLC 1365968.
  2. [2]
    Crusio WE; van Abeelen JH (February 1986). "The genetic architecture of behavioural responses to novelty in mice". Heredity. 56 (1): 55–63. doi:10.1038/hdy.1986.8. PMID 3943979.
  3. [3]
    Crusio WE, Schwegler H, van Abeelen JH (February 1989). "Behavioral responses to novelty and structural variation of the hippocampus in mice. I. Quantitative-genetic analysis of behavior in the open-field". Behavioural Brain Research. 32 (1): 75–80. doi:10.1016/S0166-4328(89)80074-9. PMID 2930636. S2CID 675083.
  4. [4]
    Crusio WE (November 2001). "Genetic dissection of mouse exploratory behaviour". Behavioural Brain Research. 125 (1–2): 127–32. doi:10.1016/S0166-4328(01)00280-7. PMID 11682103. S2CID 28031277.
  5. [5]
    Gerlai R; Crusio WE; Csányi V (July 1990). "Inheritance of species-specific behaviors in the paradise fish (Macropodus opercularis): a diallel study". Behavior Genetics. 20 (4): 487–98. doi:10.1007/BF01067715. PMID 2256892. S2CID 22641118.


Stub icon

This genetics article is a stub. You can help Wikipedia by expanding it.
Share this article:

This article uses material from the Wikipedia article Ambidirectional_dominance, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.