Southern house mice are smaller than northern house mice (IMAGE)

University of California - Berkeley

Southern house mice are smaller than northern house mice

Caption

A house mouse from a southern population (left) is much smaller than a house mouse from a northern population (right), even when raised in the same environment, showing that the body size difference is the result of genetic variation caused by adaptation, presumably to cold temperatures.

Credit

UC Berkeley photos by Katya Mack

Usage Restrictions

None

License

Licensed content

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.