DNA similarities help choose friends
New York: Friends are family and you choose them because they share many common genes with you.
According to an interesting study, people choose friends who have some DNA sequences in common with them.
"Humans are unique in that we create long term connections with people of our species. Why do we do that? Why do we make friends? Not only that, we prefer the company of people we resemble," said Nicholas Christakis, a social scientist at Yale University in Connecticut.
To reach this conclusion, researchers compared gene variations between 2,000 people who were not biologically related.
After analysing almost 1.5 million markers of gene variations, they found that pairs of friends had the same level of genetic relation as people did with a fourth cousin - or a great-great-great grandfather - that translates to about one percent of the human genome.
"Most people do not know who their fourth cousins are, yet we are somehow, among a myriad of possibilities, managing to select as friends the people who resemble our kin," Christakis contended.
The most common gene shared by friends was the "olfactory" gene - involved in the sense of smell.
The results suggest that choosing friends who share similar genes is a behaviour that may have contributed to human evolution.
The study appeared in the journal Proceedings of the National Academy of Sciences.
More from India
More from World
More from Sports
More from Entertaiment
- Sheena's diary reveals disturbed relationship with parents: DNA reports
- Shameless cheating in exams, when will Bihar learn?
- Setback for Air India as 30 Boeing 787 Dreamliner pilots resign
- Sheena case: Indrani quizzed jointly with Peter, denies killing daughter
- India's ceasefire violations threat to regional peace and security: Nawaz Sharif
- Sonakshi Sinha silences Twitter troll for calling her ugly and it's epic!
- Furkan, not Tiger Memon, arrested in Pakistan
- Sheena Bora murder case: Peter Mukerjea's statement recorded, police search his Worli residence
- Modi effect! Pakistan-occupied Kashmir wants to be part of India
- Sheena Bora murder saga: 12 questions that police asked Peter Mukerjea during 12-hour grilling?