Bellringer-5/14/15 What does it mean to be the “fittest” individual?

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Presentation transcript:

Bellringer-5/14/15 What does it mean to be the “fittest” individual? Which moth has the greatest chance for survival? Why? Over time as natural selection occurs and the moths that survive go on to reproduce, what color will be most common in the population?

Speciation HOW SPECIES CHANGE OVER TIME

Speciation Speciation refers to the evolutionary process by which new biological species arise

Directional Selection When one extreme phenotype has the best chance to survive As a result, the frequency (number) of those with that phenotype shift over time Woodpecker beaks

Evolution of the horse DIRECTIONAL selection Using the diagram as evidence, how did the horse evolve over time? Hypothesize why these changes could have happened.

Stabilizing Selection When the intermediate phenotype has the best chance to survive Heterozygote advantage Birth weight

Disruptive Selection When both extreme phenotypes have the best chance to survive Peppered moth