People often choose you to have similar genes

We often think that choosing friends mainly depends on personal characteristics or views . However, according to a recent study by American scientists, it is possible that people may have casually selected Friends are those who have genetic similarities.

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To conduct research, scientists focused on comparing nearly 2,000 unrelated people, including friends and acquaintances. Results showed that people who are friends of each other often have genetic similarities . This rate accounts for 1%, higher than the rate among those who do not know. Scientists have found that the genetic similarity among friends is equivalent to the level of similarity between four distant relatives.

Nicholas Christakis, a professor at Yale University, one of the authors of the study, said that although the 1% figure sounds very small, for geneticists, this is a child. numbers are extremely significant. This work shows an interesting fact that among the countless choices and abilities, people tend to choose for themselves friends with similarities in blood relation. Scientists also said that the most common genetic similarity between friends is the olfactory and weakest genes in the genome that affect immunity. However, this mechanism does not yet have any explanation.

"Most people don't even know who their fourth-generation relatives are. But somehow, in a myriad of different possibilities, we may have chosen friends who are sharp. Similar to our relatives , " said Nicholas Christakis. In addition, the team of researchers also suggested that the trend of selecting friends among people with genetic similarity is a very likely behavior that affects human evolution.