In the largest study of twins in schizophrenia research to date, researchers have estimated that as much as 79% of schizophrenia risk may be explained by genetic factors. The estimate indicates that ...

Quantitative genetic analyses require extensive measurements of phenotypic traits, a task that is often not trivial, especially in wild populations. On top of instrumental measurement error, some ...

Both genetic and environmental factors explain cognitive traits, shows a new study carried out on red junglefowl. Researchers have shown that the ability of fowl to cope with difficult learning tasks ...

Heritability is a fraught topic. It comes up repeatedly on this weblog, but even long time readers can be confused as to its implications, as evidenced by the incorrect inferences made from their own ...

AbstractThe hypothesis that female extra-pair reproduction in socially monogamous animals reflects indirect genetic benefits requires that there be additive and/or nonadditive genetic variance in ...