My state (Tripura) originally had a mostly mongoloid-feature-possessing population (ethnic group: Tripuri). Recently a large number of non-mongoloid people (ethnic group: Bengali) have migrated to Tripura. Assuming that reproductive barriers are not present between these two subpopulations in future, are epicanthic folds likely to be a prominent feature of the new hybridized population?

I've found some non-scientific discussions here and here.

In this newspaper article, an anthropologist is cited as saying the following:

Poirier attributes the fold to pleiotropic genes--single genes that control more than one characteristic or function--but he has no explanation for its origin

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    $\begingroup$ This is an interesting question. What did you find when you googled this question? Please show us your research results. Thanks! $\endgroup$ – anongoodnurse Jan 30 '17 at 15:30
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    $\begingroup$ @anongoodnurse, There were several sites where I found answers which are not backed by research and no genetic rationale but by everyday observation.So I didn't put them in question. $\endgroup$ – user15816 Jan 30 '17 at 15:40
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    $\begingroup$ @ItachíUchiha You can link those sites anyway stating that you don't know whether the sources can be trusted. These sources may always help one to answer. $\endgroup$ – Remi.b Jan 30 '17 at 15:50
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    $\begingroup$ I did some preliminary searches but could find nothing about the genetics of epicanthal folds in normal people. The only references I could find were about epicanthal folds in a variety of genetic disorders. Sorry. :( $\endgroup$ – anongoodnurse Jan 31 '17 at 3:48
  • $\begingroup$ @anongoodnurse,please don't be sorry.Thanks a lot for your efforts. ^_^ $\endgroup$ – user15816 Jan 31 '17 at 8:59

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