If your friends feel like family, there's a good reason for it

[riky]

If your friends feel like family, there's a good reason for it

By Will Dunham WASHINGTON (Reuters) - The truism that friends are the family you choose may be more accurate than you might suppose. A study published on Monday found that people are apt to pick friends who are genetically similar to themselves - so much so that friends tend to be as alike at the genetic level as a person's fourth cousin. The researchers compared people identified as friends to those who were not. The study showed people were most similar to their friends in olfactory genes, which involve the sense of smell, and were least similar in relation to immune system genes.

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