Instances in which natural selection maintains genetic variation in a population over millions
of years are thought to be extremely rare. We conducted a genome-wide scan for long-lived …

To investigate the consequences of hybridization between species, we studied three
replicate hybrid populations that formed naturally between two swordtail fish species …

Genetic admixture is central to primate evolution. We combined 50 years of field
observations of immigration and group demography with genomic data from~ 9 generations …

Balancing selection has been shown to act on several genes in short-term evolutionary
contexts, but it is not known whether this force is responsible for maintaining a significant …

Variation within genes has important implications for all biological traits. We identified 3899
single nucleotide polymorphisms (SNPs) that were present within 313 genes from 82 …

Germline mutation determines rates of molecular evolution, genetic diversity, and fitness
load. In humans, the average point mutation rate is 1.2× 10− 8 per base pair per generation …

INTRODUCTION Large-scale human genome-sequencing studies to date have been limited
to large, metropolitan populations or to small numbers of genomes from each group. Much …

Balancing selection maintains advantageous genetic and phenotypic diversity in
populations. When selection acts for long evolutionary periods selected polymorphisms may …

By the age of 16 every kid knows about the cultural taboos of incest—and that it is
genetically contraindicated to marry your cousin, let alone a sibling. Avoidance of inbreeding …

The behavioral and ecological factors involved in immune system evolution remain poorly
explored. We present a phylogenetic analysis of white blood cell counts in primates to test …