Marked geographic patterns for the distribution of some heritable traits are observed in humans, including traits related to disease risk, pathogen resistance and drug response. In some cases, the ...

The unexpected discovery of a new type of genetic variation suggests that natural selection -- the force that drives evolution -- is both more powerful and more complex than scientists have thought.

Heritability, the proportion of variation in a particular trait that is attributable to genetic factors, is a fundamental parameter in genetics. First introduced by Sewall Wright and Ronald Fisher ...