Modeling Natural Selection

Modeling Natural Selection: The Peppered Moth Adapted from Global Change

Introduction:(Biston betulari

Record the possible genotypes for Dark moth: Light moth: •

AA mothies:

•

Aa mothlets:

•

aa moths:

Total initial moth population is: 250 AA + 500 Aa + 250 aa = 1000 moths Total initial moth frequency is: .25 AA + .5 Aa + .25 aa = 1.0 Investigating the System Simulation 1Phenotype Frequency Red Frequency Blue Frequency (Light Moths) (Dark Moths) Trial 1: Pollution = 0 Trial 2: Pollution = .5 Trial 3: Pollution = 1

Analysis 1:

Simulation 2Genotype Frequencies AA (Blue) Frequency Trial 1: Pollution = 0 Trial 2: Pollution = .5 Trial 3: Pollution = 1 Analysis 2:

Aa (Red) Frequency

aa (Pink) Frequency

Simulation 3: In this simulation, you will be comparing genotype frequencies of a moth population as the effects of pollution are reduced. Prediction: Remember AA (Blue) Frequency Aa (Red) Frequency aa (Pink) Frequency Trial 1: Pollution = Trial 2: Pollution = Trial 3: Pollution = Analysis 3: Discussion: