Causes of human left-handed

About 10% of the world population is left-handed due to genetic and environmental genes.

Scientists believe that genetic factors play a role in determining the dominant hand of humans. A 2007 study found a genetic gene called LRRTM1 , which can increase the ability to produce a left-handed child.

10% of the world population is left-handed.

Stanley Coren, a psychologist at the University of British Columbia, told LiveScience that the environment also plays a huge role in left-handed habits. About half of the left-handed people are due to injury when the mother is pregnant or born.

Scientists also say that everyone is born right-handed, but because brain damage causes an unwanted effect, the programmed brain becomes left-handed.

According to the study, left-handed people often have dyslexia, schizophrenia and have a weak immune system, allergies or scarlet fever.

Despite having health problems, most geniuses are left-handed, like Albert Einstein, Benjamin Franklin, Isaac Newton and Charles Darwin. Left-handed people often excel in areas such as architecture and painting. Meanwhile, right-handed people are better at math, Stanley Coren said.