Global Patches

This model is an example of genetic drift as the result of random selection. It shows that patches which randomly exchange colors converge on a single color, and hence that trait drifts can occur without any particular purpose or 'selection pressure'.

For detailed instructions on using the program, take a look at the info window from the Global Patches model.

Download the StarLogoT source code for the Global Patches model:
Download gdglobalp

To run this file you need StarLogoT2002 for the Macintosh.
(download StarLogoT)

Click on one of the pictures to see a quicktime movie of the model: