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Friendship and Natural Selection - Coggle Diagram
Friendship and Natural Selection
Friends have very similar genotypes
Could be because people may be attracted to those who share similar ethnicities
homophilic: a positive correlation between genotypes. .
kinship coefficient method was used to determine this type of relationship.
made sure that friends taken in the sample were not related
heterophilic: a negative correlation between genotypes
emperical probability at a specific SNP was used to determine this relationship.
Christakis N, Fowlerd J. Friendship and Natural Selection. PNAS. 111 (3): 10796-10801
Questions i have regarding the research
Could geographics and cultural diversity affect these results?
Does social "norms" play a role in friend groups?
What would happen if you put 1 person from every race into a controlled environment? would those most similar looking congregate? or would it be random?
P values were compared between friends and strangers data.
There were more random results in the friends when compared to the stranger group
done in order to see if the differences in the P values were because a negative or positive correlation in genes.
low levels of correlation between many different genes
data showed that friends have more differences and similarities in their genome when compared to strangers
Evolutionary fitness in genes
there should be positive selection for genes that have a positive correlation in friends.