Biston betularia (peppered moth)
Decline of the light-colored phenotype from 1848-1898
Use the slider to set the selection coefficient s in Haldane’s model, which assumes that the light-colored (non-melanic) form is selected against with selection coefficient s.
Can you find the value of s that reduces the light-colored phenotype from 0.99 down to 0.01 over the 50 year period 1948-1898? Haldane (1924, p. 26) found the value to be approximately 0.3.