With the way the world is moving forward creating hybrid animals. In the very distant future with selective dna do you think scientest will be able to take the dna of a Rhina and cross it with a Horse to make a real life Unicorn?
Since each gene seems to affect a number of different attributes I suspect the scientists would need to understand a heck of a lot about how everything works before they could even attempt it. And then it wouldn't be worth the bother since there is no obvious use for a unicorn save to look at. But yes, know enough and you can do amazing things.