Photo: Gene for Left-Handed Trait Discovered

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Human DNA is packaged into 46 chromosomes that hold nearly 80,000 genes, the genetic code for proteins that define how a person works.

A newfound gene called LRRTM1 is likely responsible for people being left-handed, new research says. The same gene is also linked to certain mental conditions including schizophrenia.

Graphic courtesy Genome Management Information System, Oak Ridge National Laboratory

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