-- Robert Preidt
SUNDAY, Oct. 6 (HealthDay News) -- Genetics do not play a major
role in determining whether people are right- or left-handed, a new
About 10 percent of people worldwide are left-handed, but the
reasons why people favor one hand over the other remain
In an effort to learn more, researchers conducted genetic
analyses of nearly 4,000 twins in the United Kingdom, but were
unable to find a strong genetic factor in determining
The study was published recently in the journal
Even though they didn't find a strong genetic influence on
handedness, the researchers noted that it is widely believed that
handedness is not just the result of choice or learning. Therefore,
it's likely that genetic factors play at least a minor role in
Another recent study, published in the journal
PLoS Genetics, has found that genetics do play a part in
handedness, along with environment.
"It is likely that there are many relatively weak genetic factors in handedness, rather than any strong factors, and much bigger studies than our own will be needed to identify such genes unambiguously," John Armour of the University of Nottingham, co-author of the latest study, said in a university news release.
"As a consequence, even if these genes are identified in the future, it is very unlikely that handedness could be usefully predicted by analysis of human DNA," he added.
The Nemours Foundation has more about being
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