They discover that we share many genes with our friends

In a previous article we faced the question of whether we choose our romantic partners based on the differences we have with them or on the similarities.

Today, in addition, we will analyze a recent investigation that compared the genetic similarity between friends.

Similar genetics between friends? Research suggests so

A recent study noted that people of the same circle of friendsthey have genetic matches that could be compared to a degree of kinship of fourth-degree cousins.

Investigation

The National Science Academy has shown, based on research from the Framingham Heart Study, that individuals choose friendships with a high degree of genetic match. The authors of the finding worked with a sample of 1,900 subjects and examined more than 1.5 million variables and genetic markers.

A genetic resemblance equivalent to that of fourth-degree cousins

The study compared unrelated pairs of friends with pairs of subjects who were not related or knew each other in advance. It was reported that pairs of friends share 1% of genes

. According to James Fowler, a co-author of the research and professor of genetics in medicine, "This percentage of genetic coincidence is equivalent to that of fourth degree cousins".

In addition, the genetic indicators that we share with our friends are also those that are characterized by undergoing evolutions more frequently compared to the rest of the genes, according to the researchers. The study reveals that friends play an influential role in our health: “Health is not only based on physiological issues, but the people around us also influence it, especially friends, ”says study co-author Nicholas Christakis, professor of biology, sociology and medicine. evolutionary at Yale.

The key is in 'metagenomics'

The research also concluded that the people we choose as friends tend to have notable differences. compared to us in their type of immune system, which can have a positive effect on both of us because we offers a complementary immune protection. This study supports the scientific line that points out that human beings are metagenomics, that is, we are not only a combination of individual genes, but also a mixture of genes from the people who make up our circle of friendships.

Bibliographic references:

• Original study: http://ucsdnews.ucsd.edu/pressrelease/friends_are_...