Natural selection, genetic drift, and gene flow are the mechanisms that cause changes in allele frequencies over time. When one or more of these forces are acting in a population, the population ...

Mutation is the source of genetic diversity on which natural selection acts, therefore understanding the rates of mutations is crucial for understanding evolutionary trajectories. In this Opinion ...

Random genetic drift has certainly played a big role in human evolution. Human populations were tiny until around 10,000 years ago, and went through a major bottleneck around 2 million years ago.

Genetics is the study of how heritable traits are transmitted from parents to offspring. The theory of natural selection states that variations occur, but Charles Darwin couldn't explain how.

T. Hofer, N. Ray, D. Wegmann, L. Excoffier (2009). Large allele frequency differences between human continental groups are more likely to have occurred by drift during range expansions than by ...

Genetic drift continues to change the frequency of alleles—different versions, or variants, of a given gene—as it does in all biological populations. "The census size of humans has now ...

Genetic Drift and the Founder Effect: Eastern Pennsylvania is home to beautiful farmlands and countryside, but it's also a gold mine of information for geneticists, who have studied the region's ...

"Regressive evolution," or the reduction of traits over time, is the result of either natural selection or genetic drift, according to a study on cavefish by researchers at New York University's ...

My colleagues and I have for the past 15 years been investigating genetic drift in the populations of the cities and villages in the Parma Valley in Italy.

Genetic drift caught in action in invasive birds Date: January 17, 2018 Source: American Ornithological Society Publications Office Summary: Studies of island bird populations have taught us a lot ...

Genetic Drift and the Founder Effect: Eastern Pennsylvania is home to beautiful farmlands and countryside, but it's also a gold mine of information for geneticists, who have studied the region's ...