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Friends Are Genetically Similar
관리자 2022-08-16 오후 4:00:39 5672

 




Friends Are Genetically Similar



We may have many things in common with our friends. From similar interests and hobbies to similar tastes in food, we tend to befriend people who are like us in some way. But what if our similarities with our friends run even deeper than that?

In 2014, a scientific study in the United States found that people tend to choose friends who are genetically similar to themselves. In the study, researchers from the University of California, San Diego, looked at the genomes* of 1,932 different people. They compared the genes of close friends to those of total strangers.

Incredibly, the results showed that friends are genetically more similar to each other than they are to strangers. This was despite none of the subjects being related by blood.

According to the study, the friends shared about one percent of their genes. In genetic terms, this means they are as close as fourth cousins, who share great-great-great grandparents.

Researchers believe that choosing genetically similar friends could have provided an evolutionary advantage in early humans. Surrounding yourself with people who share commonalities at a biological level may have helped to build stronger relationships and support networks.

Interestingly, the main similarities were found in the genes that control the sense of smell. At the same time, the data showed that friends were significantly different in their immunity genes.

This difference also makes sense from an evolutionary point of view. If our friends have better protection against the germs that hurt us, they can take care of us when we get sick.

For centuries, many researchers have examined the social and psychological origins of friendship. However, the University of California study offered new insight by revealing friendship’s biological factors.

“We not only form ties with people superficially like ourselves,” said Nicholas Christakis, co-author of the study. “But we also form ties with people who are like us on a deep genetic level.”

Questions:
1. What are the common reasons for people befriending other people?
2. What does a scientific study about choosing friends in 2014 show?
3. According to the study, how are friends genetically related?
4. Why did researcher Nicholas Christakis say we don't only form ties with people superficially?
5. How do you feel about this research? Does it make you want to know more deeply about your friends? Why?

 
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