I am not sure this answers the question.
There are no half-breeds, or mixed-blood, therefore all mixed marriages will produce a pure blood of "higher" type at least 80% of the time.
Even if they are repulsed, happens only few times, mathematics is not optional.
If there are any percentage of interracial marriage which must produce a "higher" type of race, the lower races will disappear.
It is just simple math. It depends on percentage of racial mixture, but the rate increases, until all are Matis.
There are no half-breeds, or mixed-blood, therefore all mixed marriages will produce a pure blood of "higher" type at least 80% of the time.
Even if they are repulsed, happens only few times, mathematics is not optional.
If there are any percentage of interracial marriage which must produce a "higher" type of race, the lower races will disappear.
It is just simple math. It depends on percentage of racial mixture, but the rate increases, until all are Matis.