Yup, but genetic variation ≠ phenotype variation, which is what people are really interested in.https://twitter.com/matthewcobb/status/917027668968820737 …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
cousin marriage to show up higher on this graph even in populations with greater genetic diversity present in the population as a whole?
it's tricky, 'cause other things can also make pops more homogeneous or not (in their dna) like bottlenecks. so pops in americas very...
...similar genetically speaking, 'cause they went thru huge bottleneck of migrating to the new world.
the different processes (say bottlenecks vs. cousin marriage) do leave different signatures in pop genomes, tho, in varying lengths in...
...runs of homozygosity (roh). here you can see that new world pops share a lot of short roh (bottleneck) while middle easterners...pic.twitter.com/u39XDALglj
...share a lot of medium length roh thanks to inbreeding. so, there's diff sorts of varation in homizygosity for diff reasons.
So, in this data overall it looks like the effects of human migration out of Africa are dominating any recent cousin marriage practices, but perhaps if we compare the 1-2Mb range to the 4-8Mb range there we can see how more recent practices are reducing the Euro and East Asian
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.