Maybe the untold portion of that story is that Michael paid to do genetic manipulation to his DNA before introducing to her, or the eggs(children) were manipulated before they were growing into people.
Could be, he would be the person who could pay a million to have some mad scientist do it.
Again, we don't know. IMO, anything on this thread is guesses, speculation, perhaps rumor and our shock at how cheap the ring was.
I don't think that genes can be manipulated THAT much,at this time...no matter how much money one has.