The protozoan parasite Trypanosoma brucei gambiense has undergone recent clonal evolution that reveals the theoretically predicted Meselson effect at a genome-wide level.

Bacteria growing in biofilms evolve antimicrobial resistance via different pathways and generate greater genetic diversity than well-mixed populations, selecting fitter but less resistant genotypes.

A health-system embedding method for genomic discovery and clinical characterization of disease highlights the importance of documenting a wider spectrum of genetic disorders in diverse populations.

Hawaiian Caenorhabditis elegans harbor high levels of genetic diversity that might represent the complex patterns of ancestral diversity in the species prior to human influence.

Whole genome deep sequencing of many longitudinally sampled HIV-1 populations reveals that reversions towards ancestral HIV-1 genome sequences occur throughout the course of infection.

Environmental heterogeneity can dramatically reduce the efficacy of selection and alter the neutral evolutionary dynamics in microbial range expansions.

The expression of small RNAs (or sRNAs) is regulated not only by mRNA expression, but also by their own regulatory elements and by sRNA biogenesis genes.

Great care is needed when interpreting claims about the genetic basis of human variation based on data from genome-wide association studies.

The zebrafish is a premier model organism for biomedical research, with a rich array of tools and genomic resources, and combining these with a fuller appreciation of wild zebrafish ecology could greatly extend its utility in biological research.