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 ...

Despite years of research, the genetic factors behind many human diseases and characteristics remain unknown. The inability to find the complete genetic causes of family traits such as height or the ...

The heritability of a trait within a population is the proportion of observable differences in a trait between individuals within a population that is due to genetic differences. Factors including ...

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 ...

This is a preview. Log in through your library . Abstract To assess heterogeneity in the influence of genetic variation on educational attainment across environmental contexts, we present a ...

Kate Lynch receives funding from Macquarie University. Geneticists quantify the proportion that genes contribute using a heritability estimate, represented as h². When traits are claimed to be genetic ...

The relative importance of genetic factors in tinnitus is low, according to new research from the Norwegian Institute of Public Health. This is the first large population-based study to measure the ...

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 ...

Molecular biologist Chao-Qiang Lai of the Jean Mayer U.S. Department of Agriculture Human Nutrition Research Center on Aging at Tufts University answers This question can be rephrased as: "How much ...