I recently read of a couple, both are half-African and half-American, gave birth to twin girls with one looking completely an African and the other one completely an American. According to genetic doctors, this can happen twice within a million! This is unique because the two girls are totally different in skin color.
I don't mind having a twin with one being totally Kadazan-dusun and the other one being totally Chinese! I bet we have to do maternal and paternity test from dnacenter.com to really make sure of the probability....Or, just let nature do the unique job, if God's willing.