Horizontal gene transfer (HGT) helps slightly beneficial genes persist in microbial populations, incentivising cells to invest in costly DNA uptake, even in the presence of harmful selfish genetic elements.
A novel assay to measure 2-micron stability together with a survey of natural variation among Saccharomyces cerevisiae strains reveals novel means by which yeasts can combat the parasitic 2-micron plasmids.
Out breeding depression in Caenorhabditis tropicalis is due to common maternal-offspring incompatibilities that interact with a highly heterogeneous genetic background and may provide a short-term advantage to inbreeding.
Female-inherited supernumerary chromosomes that lack a male-inherited homolog are transmitted to all meiotic products instead of the expected half, which indicates an additional amplification of unpaired chromosomes during meiosis.
Two members of a large fission yeast (Schizosaccharomyces pombe) gene family are shown to act as spore killers that enhance their own transmission into progenies by impeding the maturation of spores not inheriting them.