The cause of left-handed people

A genetic study reveals biological processes influencing whether we are right or left-handed. Researchers from several universities from England and Netherlands such as the University of Oxford, St. Andrews, Bristol, and the Max Plank Institute in Nymegen, found a correlation between the tendency of the right or left hand use and the genes network that involved in establishing the left-right asymmetry in developing embryos.

A genetic study has identified a biological process that influences whether we are right handed or left handed. (Picture from: http://www.sciencedaily.com/)

"The genes involved in biological processes from the early embryo develops from a ball of cells and grow into an organism to determine the trend of using the right or the left hand," said William Brandler, researchers at the MRC Functional Genomics Unit at Oxford University.

The researchers believe that genes also help determine the difference in the right and left brain, which ultimately affect the right or left hand use. The findings, reported in the PLoS Genetics journal on mid-September 2013.

Humans are the only species that showed a large deviation in the difference in right and left hand. Approximately 90 percent of humans are right-handed. Cause of this large difference remains a mystery to this day.

The researchers which is led by Silvia Paracchini of the University of St. Andrews interested to know which genes affect the use of the hands, as well as investigate the causes and evolution of the right or left hand use.

Conducted genome-wide association studies to identify common genomic variants that may correlate with the trend of using the most preferred hand. The most significant variant contained in the gene PCSK6, which are involved in the determination of left and right on fetal development.

"The development of the use of the right and the left hand is the result of a combination of various genes, environment, and environmental pressure to be right-handed," said William Brandler. *** [EKA | FROM VARIUOS SOURCES | SCIENCEDAILY | UNIVERSITY OF OXFORD | KORAN TEMPO 4345]

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