Using Hamilton's rule, __________.
A) a benefit given to a full sibling must be twice the costs to the actor for altruistic decision rules to evolve
B) a benefit given to a half sibling must be twice the costs to the actor for altruistic decision rules to evolve
C) a benefit given to a first cousin must be half the costs to the actor for altruistic decision rules to evolve
D) a benefit given to a first cousin must be four times the costs to the actor for altruistic decision rules to evolve

Question

Quizplus · Accepted Answer

Hamilton's rule states that altruism is favored when the benefit to the recipient, weighted by the coefficient of relatedness, exceeds the cost to the actor. For full siblings, the coefficient of relatedness is 0.5, so the benefit must be twice the cost for altruism to evolve.

Using Hamilton's Rule, __________