Many genes that mediate sexual reproduction, such as those involved in gamete
recognition, diverge rapidly, often as a result of adaptive evolution. This widespread …

Charles Darwin proposed that evolution occurs primarily by natural selection, but this view
has been controversial from the beginning. Two of the major opposing views have been …

Many bacteria live only within animal cells and infect hosts through cytoplasmic inheritance.
These endosymbiotic lineages show distinctive population structure, with small population …

Species limits were investigated within the Fusarium graminearum clade (Fg clade) through
phylogenetic analyses of DNA sequences from portions of 11 nuclear genes including the …

Sequence comparisons of genomes or expressed sequence tags (ESTs) from related
organisms provide insight into functional conservation and diversification. We compare the …

Rapid evolution driven by positive Darwinian selection is a recurrent theme in male
reproductive protein evolution. In contrast, positive selection has never been demonstrated …

WHEN we identify a visual object such as a word or letter, our ability to detect a second
object is impaired if it appears within 400ms of the first1–5. This phenomenon has been …

Sexual reproduction is a fundamental biological process common among eukaryotes.
Because of the significance of reproductive proteins to fitness, the diversity and rapid …

ALTHOUGH the darwinian concept of adaptation was established nearly a century ago, it
has been difficult to demonstrate rigorously that the amino-acid differences between …

Degree of genetic divergence is frequently used to infer that two populations belong to
separate species, or that several populations belong to a single species. I explore the logical …