friend and cushoin similarity
Answers
You and your friends are surprisingly genetically similar, according to a study appearing in PNAS. The similarity isn't immense -- about 1%, roughly the same as between fourth cousins -- but it's significant enough to be detectedand to have evolutionary implications.
To measure the genetic similarity between friends, Nicholas Christakis and James Fowler used data from the Framingham Heart Study, a long-term cardiovascular study in which participants are examined every two years. According to Christakis and Fowler, the Framingham dataset is the only one "of any significant size" with both information on social ties and detailed genetic data, making it uniquely suited for analysis the correlation of genotype and friendship. They examined around 450,000 polymorphisms in the genomes of nearly 2,000 people and correlated their similarity within the roughly 1,400 pairs of friends within the group. Next, they compared the correlation between friends with the correlation between the (more than a million) non-friendship pairs in the same group. "Looking across the whole genome," said Fowler, "we find that, on average, we are genetically similar to our friends. We have more DNA in common with the people we pick as friends than we do with strangers in the same population."
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Answer:
You and your friends are surprisingly genetically similar, according to a study appearing in PNAS. The similarity isn't immense -- about 1%, roughly the same as between fourth cousins -- but it's significant enough to be detectedand to have evolutionary implications.
Explanation: