Genetic analysis of an island population of mice reveals that 19 quantitative trait loci are responsible for their impressive size. Island populations of animals,...


Allelic expression in the mouse genome is surprisingly unbalanced, according to new research published in the June issue of GENETICS. The factors that determine how...


In the early 1970s, a couple of hundred wild rats near the Siberian city of Novosibirsk were rounded up by scientists for an ambitious experiment...


In 1979, as the US slid into recession, researchers began systematically crossing eight distinct inbred rat strains. Their goal was to establish a genetically diverse...


Do aging males make poorer quality sperm? Older mothers face a well-established risk of producing eggs with chromosome abnormalities, but it is less clear how...