Sex between the Races Lore?

[MikkoAkure]

Probably said already but it was confirmed that if two races interbreed, 90% of the time the child born takes after the mother. So if it's a Hyur father and a Miqo'te mother, the child born is Miqo'te. Only under rare circumstances does the child become a hybrid, the most drastic case we've sen so far is Hilda during Heavensward. This is why we don't see so many of them walking around. It's a case of it being rare. The reason Hilda stands out is because her backstory involved nobles and commoners, so there was no hiding what happened between her parents.

The child taking after the mother thing is fanon from an RP website, not canon. There is no case at all of mix-race kids looking like 1 parent only.

To add, I'm not sure if it's still the case anymore, but at least around ARR-time it was considered taboo to be in a serious, committed relationship with someone from a different race. Casual flings seem to be fine considering how many miqos were hanging around hyur a lot. There was even a same-sex couple who ran away because their relationship wasn't approved by their families. Not because they were same sex, but because they were a miqo'te and a hyur. Before present, pretty much all the races were at open war with each other as they came back into Eorzea after the calamities and the racial grudges last to the present time.

The reason we don't see mixed-race children is because of the old taboo and probably because it seems it would be difficult to conceive if we're all different actual species. Inter-clan relationships seem to already be present. Yda/Lyse/Minfilia are all highlander women who look like midlanders. There are a few keepr miqo'te with seekrer names and the other way around as well.