Imagine a caregiver who helps raise a conspecific's offspring. Such caregiving reduces her fitness by 10% and increases the fitness of the recipient by 25%. According to Hamilton's rule, in which of the following scenarios could this behavior evolve?

Question

Quizplus · Accepted Answer

Hamilton's rule states that altruistic behavior can evolve if the cost to the altruist is less than the benefit to the recipient multiplied by their relatedness (rB > C). For full siblings, r = 0.5, so 0.5 * 25% = 12.5%, which is greater than the 10% cost.

Imagine a Caregiver Who Helps Raise a Conspecific's Offspring