Finally, after five days, seven hours, and twenty-three minutes, Hermione was absolutely, positively, without a doubt sure. She had retraced all of her research countless times and every retracing gave the same grim results- sooner or later, a pureblood be born to destroy magic. How could they possibly stop it? It was extremely complex to explain, and she wasn't sure that the purebloods would listen, even after the war was won. It seemed that they would have to go to the ministry about this. The corrupt, Potter-hating ministry. Hopefully, after Voldemort was dead, they would like him a little better. Either that, or magic was as good as gone.
The only thing to do now was to tell the order, and see how their resident evil cockroach would take the news. This was sure to be an accurate representation of how all other purebloods would react, though on a far lower scale, since Malfoy couldn't afford to get kicked out of the Order's safe haven. Unfortunately, this would also affect some of the purebloods that were fighting for their side, who had happened to marry other purebloods, such as the Weasleys. It was, therefore, with great trepidation that Hermione and Harry called the Order into the kitchen for a meeting, knowing that they were about to change at least some lives.
…"So, that effectively means that eventually a pureblood child will be born where this gene manifests itself and magic will be wiped out. I can't really explain it scientifically, because it's so unprecedented… but I guess the gene's effect is magical, and therefore only lives within fully magical people, ie, purebloods."
Malfoy's face had gone white. No one could really tell what he was thinking. Finally, he stood up and told them. "I think this is a load of bullshit, if you don't mind me saying. I mean, you did some research and found a gene. How could you possibly know for sure that it will wipe out magic? I mean, it hasn't happened yet, so you don't really know… all you can do is guess. Besides, purebloods have been intermarrying for centuries! It was actually not terribly long ago, in the grand scheme of things, that we began marrying muggles and tainted our blood in the first place!"
"Although you have a point, Malfoy, I think that the original urge to intermarry may have actually been a survival instinct. Muggles have been researching what attracts people to one another, and there is actually scientific proof that we are usually attracted to people with very different genes, so as to give birth to a child with the strongest possible immunities. Muggles have known for a long time that marrying your family will eventually create health problems, and purebloods are all basically a family now that there are so few. They are so genetically close to each other that even if we hadn't discovered this gene, eventually purebloods would have died out from low immune systems and things like anemia."
"Anemawho? This is making no sense, Granger, you're talking about muggle research! What do they know, they don't even have magic!"
'Malfoy, you don't have to accept it, but it's fact. I've gone over it time and time again. Fact is, it's dangerous for any purebloods to procreate with one another. They run the risk of giving birth to, more or less, the end of the magical world. And surely, that is not what purebloods have in mind…"