Understanding Evolution: your one-stop source for information on evolution
Resource library Teaching materials Evolution 101

Teaching materials : Image library:

To save: right-click (Windows) or control-click (Mac) on the image and select "Save image."

Microevolution - Change in gene frequency

Image caption:
Microevolution is a change in gene frequency in a population. Suppose you sample a beetle population this year, and determine that 80% of the genes in the population are for green coloration and 20% of them are for brown coloration. You go back the next year, repeat the procedure, and find a new ratio: 60% green genes to 40% brown genes. You have detected a microevolutionary pattern: a change in gene frequency. A change in gene frequency over time means that the population has evolved.

See the Understanding Evolution page where this image appears.

<< Back to search results

Image credit:
If you use this image in your own non-commercial project please credit it to the University of California Museum of Paleontology's Understanding Evolution (http://evolution.berkeley.edu).