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Related Experiment Videos

ABH secretion and natural selection

A E Mourant

    Annals of Human Biology
    |November 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    The secretor gene

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    Area of Science:

    • Genetics and immunology
    • Population genetics
    • Human evolution

    Background:

    • The secretor gene influences ABH blood group antigen secretion.
    • Secretor gene frequencies vary significantly across populations.
    • These variations suggest a role for natural selection.

    Purpose of the Study:

    • To explore the role of natural selection in shaping secretor gene frequencies.
    • To investigate potential selective pressures, including disease and reproductive outcomes.

    Main Methods:

    • Observational analysis of secretor gene frequencies in different populations.
    • Correlation of gene frequencies with disease prevalence and reproductive data.

    Main Results:

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  • Secretor gene frequencies differ between healthy individuals and those with certain diseases.
  • Haemolytic disease of the newborn and early fetal loss show selection against secretor and blood group antigens.
  • Epidemic infectious diseases may exert counter-selection favoring secretors.

    • Conclusions:

    • Natural selection significantly influences secretor gene frequencies.
    • Reproductive factors like haemolytic disease and fetal loss act as selective pressures.
    • Infectious diseases may provide a selective advantage to secretors.