Sex and 'The Starbucks Effect'

September 5, 2014 6:44 PM

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Sex and 'The Starbucks Effect'

It's just been discovered that genes influence who we choose for friends. We each have about 23,000 genes -- the human genome -- and by and large our genes are the same. But about 0.1 percent of the human genome varies from person to person. Publishing last month in the Proceedings of the National Academy of Sciences, scientists at Yale and the University of California, San Diego, compared the differences in genes between friends and strangers across nearly 2,000 people. And they found that friends tend to have a more similar set of genes than strangers.

"Your friends don't just resemble you superficially, they resemble you genetically," said Nicholas Christakis, one of the co-authors of the study. So much so that the similarity is as if friends shared a great-great-great grandparent. Perhaps it's obvious that we like people similar to ourselves. Bu...

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