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Pseudogenization of rcsD alters canonical Rcs phosphorelay signalling and marks a significant adaptive evolutionary step in the emergence of ubiquitous extant branches of Yersinia pestis that can maintain stable plague outbreaks.

The short lifetime of orphan genes is a major factor explaining the stability of gene number in Drosophila.

Differences in the usage of DNA repair pathways may give rise to the unique patterns of Y-linked mutations that, together with natural selection, shape rapid Y chromosome evolution.

Rapidly diversifying biotic interactions decouple the dynamics of nearly identical strains.

The invasive tick Hyalomma marginatum relies on a dual partner nutritional system to provide B vitamins and avoid nutritional deficiencies due to its exclusive blood diet.

A family of homing genetic elements that look like inteins but work differently is the progenitor of the endonuclease that enables Saccharomyces cerevisiae to change its mating type.

The hadal snailfish rapidly evolved and adapted to extreme deep-sea environments, modifying crucial genes and enhancing tolerance to high-hydrostatic pressure through ferritin gene duplication.