Does people's left-handedness have anything to do with genes?

It has a lot to do with genes. Left-handedness is a strong dominant gene with a 50% probability of inheritance. In addition, the common gene for habitual left-handedness does not go away, and due to a genetic mutation, certain habitually right-handed offspring will become habitually left-handed. According to a recent report in the journal Science, British scientists have for the first time identified gene regions associated with habitual left-handers that are linked to language-related brain regions in the brain. The genes are known to play a role in determining handedness.

Studies of twins estimate that 25 percent of the mutations associated with handedness can be attributed to genes that have not yet been identified in the general population. According to a new study published in the journal Brain, some of the genetic variants associated with left-handedness were discovered by analyzing the genomes of about 400,000 people, including 38,332 left-handed people, in a British biobank.

They identified four gene regions, three of which are associated with proteins involved in brain development and structure. Specifically, these proteins are associated with microtubules, which are part of the intracellular scaffolding (cytoskeleton). The role of the cytoskeleton is to direct the construction and function of human cells. After detailed brain imaging of about 10,000 participants, the researchers found that these genetic effects were associated with differences in the brain's white matter tracts, which contain cytoskeletons associated with language-related regions of the brain.

Dr. Akira Weinberg, a researcher at the University of Oxford, said: ? About 90 percent of the population is habitually right-handed, and this has been the case for at least 10,000 years.? Many people have studied the biological basis of hand habituation, but with the vast amount of data from the UK Biobank, we can get a clearer picture of the processes that lead to left-handed habituation. ? Finally, we have shown that left-handedness is the result of brain development, driven in part by complex interactions between many genes, which reflects the richness of the human race, the researchers said.