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exam review - Natural selection- differential reproductive...

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Natural selection- differential reproductive success of individuals o # of surviving offspring o requires variation between individuals in traits (if they don’t vary then there’s nothing for natural selection to act on) o if ind can’t pass on trait to offspring, nat selection can’t act on it o diff in mortality, fecundity, and sexual selection o NON RANDOM—certain trait is favored o 3 types of natural selection-stabilizing, directional, disruptive group selection fallacy -doesn’t work because requires you to sacrifice your own RS for the group elementary social theory-3 explanations kin selection return effect social parasitism DEGREE OF RELATEDNESS A B C(offspring) 1/2 D(offspring) E(c’s offspring) F (d’s offspring) Multiply r’s that connect individuals on one line of relatedness Add when more than one line of relatedness A to C (parent to child)=1/2 A to E(parent to grandchild)=1/2*1/2=1/4 C to D(full siblings)=c to a=1/2 *a to d=1/2=1/4 from A
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This note was uploaded on 01/26/2012 for the course 70 204 taught by Professor Roberttrivers during the Spring '11 term at Rutgers.

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exam review - Natural selection- differential reproductive...

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