The incidence of human disorders is about 10% and appears to be fairly constant throughout the world. It is also known that left-handed people work in the family, which may indicate that there is a gene that influences whether a child proves to be left-handed. The only problem is that nobody can identify the gene that could be responsible.
A study conducted a few years ago at the University of Nottingham (United Kingdom) carried out detailed genetic analyzes of 2,000 pairs of twins, since it is known that identical twins tend to share more passivity than non-twins. identical This indicates a genetic link since identical twins have identical DNA.
Image: Pixabay.com
The conclusion, however, is that there is not a single gene that causes discomfort, so it may be a combination of genes to do the trick. The same is obviously true of other human characteristics such as height and cognitive abilities. It is therefore unlikely that it is always possible to predict whether a newborn will be left-handed by analyzing its DNA.
However, it appears that the study identified a gene that determines how strong the person is, both left and right, confirming another research done elsewhere. It is rare to find someone who is completely left or right, and apparently, there is a genetic reason for this.