The present theory offers a unified solution to three closely related evolutionary problems. (1) Why does an evolving population explore only a small fraction of the accessible pathways in genotype ...

Are human beings as unique as snowflakes? Not quite, but new research shows humans may have a lot more individuality than originally thought -- in fact, the genetic codes of people can vary by as much ...

A genomic study of human and selected nonhuman primate centromeres has revealed their unimaginable diversity and speed of evolutionary change. Although centromeres are vital to proper cell replication ...

The striking black-and-white patterns of the wheatear are shaped by a mosaic of genetic variations, influencing the bird's ...

A spider on the Canary Islands lost half its DNA but gained more genetic variety. Scientists say this changes how we ...

Harmful genetic changes in sperm become substantially more common as men age because some are actively favored during sperm ...

This is a preview. Log in through your library . Abstract Genetic variability was examined in two endemic cichlid fishes from Cuatro Cienegas, Coahuila, Mexico, and in Cichlasoma cyanoguttatum from ...

“Mutation” is the source of most genetic variation and the motor of evolution. It is a natural process, which occurs spontaneously and slowly — over generations — in people, plants, animals and all ...

Climate change is rapidly altering our environment—and posing major challenges for many animal species. Whether they can ...

In a first-of-its-kind experiment tracing evolution across 25 generations, scientists have discovered that marine copepods—the tiny crustaceans at the heart of the ocean food web—rely on a largely ...