Unique appearance is the main parameter, thanks to which people who have not seen each other for years can recognize each other in the crowd. It is the individual facial features that help a modern person to unlock his smartphone. A photograph of a person is an obligatory component of a passport that helps to identify a person.
We are used to our appearance being unique. However, sometimes the illusions of one's own uniqueness are shattered about reality. And in rational nature, a failure occurs, as a result of which it periodically stamps twins. What are doubles? Is this a mistake of nature or is their occurrence due to a higher purpose?
The phenomenon of the existence of twins
According to geneticists, the probability of the existence of two surprisingly similar to each other people is quite high. After all, all the individuals living today are descended from a significantly smaller number of ancestors. This means that the set of genes inherited by descendants is quite limited.
Yes, their number, taking into account constant mutation and evolution, is enough to make people different from each other. But theoretically, to provide a unique appearance to more than 7 billion people, they may not be enough. And an excellent proof of this is the case of meeting doubles. A double is a very similar or almost indistinguishable person.
In addition, it is believed that the genome of humanity coincides 99.9%. And only 0.1% is responsible for the individuality of each of the people. There are even fewer genes responsible for appearance. Therefore, even, it would seem, with a huge number of DNA combinations, the chance of the formation of similar external data has a right to exist.
Why can faces look like?
First of all, all people are representatives of the same species. We are connected by approximately similar proportions of the body, the structure of the face and our needs often coincide.
In addition, from a mathematical point of view, all people are to some extent related to each other. Calculations helped to find out that after 8 generations each person can have about 250 relatives, and after 30 generations this number can exceed 1 million. Therefore, it is logical that there is a chance of meeting with some kind of fifty-cousin, whose amazingly pronounced the same genetic set from his ancestors.
How high is the chance to meet your double?
In fact, the chance to meet a twin is extremely small. The variety of races significantly reduces it, because it is impossible to imagine that the Chinese will look like a Nigerian.
But the likelihood of meeting your double is noticeably increased in people belonging to common ethnic groups. In addition, similar features are more common in mestizos, since the number of combinations combining the characteristic features of two peoples is very limited.