>>531900829
Theory: This didn't strictly happen as genetics don't actually exist when it comes to Mer since they are not strictly biological beings due to them descending from Aedra and Aedratic souls mantle the race of the mother (Mankar Camoran talks about this) on birth so really it's more like Bretons are just Nedes with quasi-Altmer souls and not actually genetically "half-elves". Men however come from the earth and thus are affected by natural laws like genetics, which means Imperials are possibly Nedes who did the sexy with Nords and Redguards and that's why they are distinct from Nedes.