Influence of genes in friendship (Methods (Avoid ancestral errors (Only…
Influence of genes in friendship
Correlation may be influenced by geography and ancestry
Friendship retention may be influence by genotype
Environment can play a role
Third party may influence friendships
Environments may foster friendships among different genotypes
People may actively seek out different phenotype friendships.
Data from Framing Hearts Study analyzed for SNP's in 1,932 subjects.
Avoid ancestral errors
Only 907 pairs were used with kinship below or equal to 0.
Stranger pair restricted to kinship less than or equal to 0
Homophily- Kinshp coefficient was calculated
Heterophily- empirical probability of opposing genotypes among SNP's compared to proportion of SNP's without either allele similarity.
Friendships comparative to fourth cousins (p-2x10^-16)
Friends have fewer opposing SNP's (p=4x10^-9)
Olfactory senses appear to play a role in frienships
Linoleic acid may affect friendships (used as a pheromone in moths).
Genes affecting immune system did not appear to influence selection (possibly seeking different immune genes in incorporate into future offspring)