Scientists have found that people with similar DNA structure often choose each other to build a family. Data published in the scientific journal Proceedings of the National Academy of Sciences (PNAS).
Note that often the level of education, race, and many other characteristics influence the choice of a partner does not have. Data were installed in a large study involving 825 pairs, different on different parameters.
Researchers scanned the genomes of volunteers. Managed to prove that in most cases, a man and a woman, forming a pair, had a similar DNA structure. According to the research results, and that is more than 30% of all cases.