Single-Gene Greenbeard Effects in the Social Amoeba Dictyostelium discoideum

@article{Queller2003SingleGeneGE,
  title={Single-Gene Greenbeard Effects in the Social Amoeba Dictyostelium discoideum},
  author={David C. Queller and Eleonora Ponte and Salvatore Bozzaro and Joan E. Strassmann},
  journal={Science},
  year={2003},
  volume={299},
  pages={105 - 106}
}
Selection can favor reproductive altruism if an altruism allele aids copies of itself by helping relatives. The alternative “greenbeard” mechanism, in which an allele directly recognizes and aids copies of itself in others, is generally thought to be too complex for a single gene to carry out. The csA gene inDictyostelium discoideum acts as a single-gene greenbeard. When wild-type cells are mixed with csA-knockout cells, the wild type is more altruistic, but is also able preferentially to… 
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