1. And now for a brief reminder, using Jon Herron’s AlleleA1 program ...
Evolutionary forces
Selection
Mutation
Migration
Genetic drift
In the absence of these evolutionary forces, what happens to allele frequencies from one generation to the next, assuming that mating is random?
And now for a brief reminder, using Jon Herron’s AlleleA1 program ...

2. Linanthus parryae Desert Snow

3. What sort of experiments or observations are needed?
What evolutionary force might produce the observed distribution of flower color?
What sort of experiments or observations are needed?

4. And now for a brief reminder, using Jon Herron’s AlleleA1 program ...
Sewall Wright
And now for a brief reminder, using Jon Herron’s AlleleA1 program ...

5. 11 years, 41,718 plants, and 713,364 seeds later ...
Doug Schemske and Paulette Bierzychudek (2001) Evolution 55:
11 years, 41,718 plants, and 713,364 seeds later ...

6. Major conclusions
Flower color polymorphism was not established, and is not maintained, by random genetic drift
Selection is strong
Polymorphism is maintained by temporal variation in the direction of selection