Inversions are structural mutations that reverse the sequence of a chromosome segment
and reduce the effective rate of recombination in the heterozygous state. They play a major …

The pattern of greater species mating discrimination between sympatric taxa than between
allopatric taxa has been attributed to the strengthening of mate discrimination to avoid …

REINFORCEMENT is the process by which natural selection strengthens sexual isolation
between incipient species, reducing the frequency of maladaptive hybridization and hence …

Background Codon usage bias (CUB), the uneven use of synonymous codons, is a
ubiquitous observation in virtually all organisms examined. The pattern of codon usage is …

The divergence of Drosophila pseudoobscura from its close relatives, D. persimilis and D.
pseudoobscura bogotana, was examined using the pattern of DNA sequence variation in a …

We have summarized and analyzed all available nuclear DNA sequence polymorphism
studies for three species of Drosophila, D. melanogaster (24 loci), D. simulans (12 loci), and …

The gene arrangements of Drosophila have played a prominent role in the history of
evolutionary biology from the original quantification of genetic diversity to current studies of …

The construction and interpretation of gene trees is fundamental in molecular systematics. If
the gene is defined in a historical (coalescent) sense, there can be multiple gene trees …

Below the level of what is commonly accepted as the species in sexual organisms there may
be no phylogeny, only reticulate relationships (tokogeny) among individuals. The …

Regional rates of recombination often correlate with levels of nucleotide diversity, and either
selective or neutral hypotheses can explain this relationship. Regional recombination rates …