Eikonal Blog


Relatedness and Hamilton’s rule

Filed under: evolution, population genetics — Tags: , — sandokan65 @ 01:27

Definition: Coefficient of relatedness (Sewall Wright 1889-1988) r:

  • r=0.5 for first degree relatives,
  • r=0.25 for 2nd degree relatives,
  • r=0.125 for f3rd degree relatives, etc.

Hamilton’s rule (William Donald Hamilton (1936–2000)): r > \frac{c}{b} where c is cost of gift to donor, and b is benefit of gift to recepient.

Source: Dylan Evans & Oscar Zarate “Introducing Evolutionary Psychology”


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