1. Seeing is Believing: Evolution in your Classroom
Anne Royer & Jay Sobel

3. pre test here

4. review the necessary requirements
3 necessities for evolution by natural selection
phenotypically variable population
relationship between a trait and fitness
genetic basis to trait (heritable)
other necessities specific to classroom
something that reproduces quickly enough to see several generations in one semester or year
organisms that are easy to obtain and maintain
at least 2 selective environments
easy to measure traits with simple tools
others generated by teachers

5. Phenotypic Variation

6. Relationship between Trait and Fitness (Selection)

7. Genetic Basis to Trait (Heritability)

8. Artificial Selection Human imposed selection “Test” for Heritability
R = h2S
response to selection = heritability x selection strength
Used for plant and animal breeding for thousands of years

9. Connecting Artificial Selection to Natural Selection
Selection imposed by “environment”
could include abiotic sources like climate, soils, etc.
biotic sources like mutualists or predators
Strength of selection imposed may be strong or weak (unlike artificial selection), but lots of time involved