Friends Are Genetically Similar (2014)
&gt; The tendency for friends to have similar genomes might result from people befriending those of similar ancestry, but the duo are confident that isn&#x27;t the case. Not only did they control for the effect of population structure and ancestry, but the Framingham data is relatively homogeneous in terms of ethnicity, consisting largely of people of European descent.<p>How did they control it? Even amongst Europeans, I imagine French people are just more likely to have French friends.