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Using today's (real) genetic engineering methods, would it be possible to engineer a horse with a single spiral horn? Maybe rub a horse on a narwhal?

I know mythical Unicorns have other "powers", but in a simple sense, I want a white horse with a horn.

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    $\begingroup$ Not as such, but they could be part of an imaginary world, based on current science, if for example i was creating such a world for a novel.... $\endgroup$ Oct 14 '15 at 10:49
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    $\begingroup$ en.wikipedia.org/wiki/White_(horse) $\endgroup$ Oct 14 '15 at 12:15
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    $\begingroup$ I'm a little confused why this is off topic, as the rules state: "questions are welcome that are about: Creation of elements of a world (..., species, ..., ...)" $\endgroup$ Oct 14 '15 at 13:00
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    $\begingroup$ Side note: I read a great short story once, about company that makes genetically altered creatures to order - a rich woman ordered a pegasus that actually flew, so they reverse engineered a bird/dino... It didn't end well. (Sorry can't remember the name of the story/anthology or author). $\endgroup$
    – SeanR
    Oct 14 '15 at 15:46
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    $\begingroup$ I have to upvote this simply for the phrase, Maybe rub a horse on a narwhal thanks for that, needed a laugh this morning. $\endgroup$
    – James
    Oct 15 '15 at 13:44
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You might be better off starting with a goat rather than a horse. There certainly have been single-horned goats. Breed them until you find some that breed true. This would also explain why the unicorn has goat hooves. And it allows the unicorn to be developed with simple breeding rather than genetic engineering.

You might have some extra work to make the unicorn large enough to ride. I.e. you might need to breed multiple generations to concentrate on size, strength, and speed to make them more horse-like.

Sorry, no solution for making the one-horned goat prefer virgin riders.

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    $\begingroup$ Actually, I've heard that if a baby goat's two horn buds are bound together, they'll grow into a spiral horn. It's human intervention. $\endgroup$
    – Monty Wild
    Oct 15 '15 at 23:01
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    $\begingroup$ You could probably just breed goats to have horn buds closer to the center of the head until you come up with one where the buds are naturally fused at birth. Also worth noting: originally, unicorns were more goat-like than horse-like. $\endgroup$ Jul 25 '17 at 6:29
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There is no reason to believe such a creature cannot exist. For all practical reasons, a creature like that is possible with some genomix and playing around with the bone structure DNA of the head region.

narwhal

If a bizarre animal like narwhal can exist, why not a horse with a horn?

unicornfish

And there's even a fish that has a forehead horn. It's no amazement it's known as Unicornfish!

rhinoceros

And then there was your favorite Elasmotherium! Giant, magnificent and extremely bad tempered. You won't want to meet him face to face in the wild. That's probably why they are extinct now.

Anyhow, the point is that it is possible to have unicorn-like horses in reality if you fiddle with their genes controlling the shape of their heads.

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One of the things you need to realize, is that horn is not always bone. In the case of rhinos, it is actually a clump of modified hair, like the plates of a pangolin(google it) which are also horns. The second thing is that narwhals do not have horns but a tusk, a modified tooth.

This fact actually makes the process somewhat easier as all you have to do is insert a gene that makes the hair on the horses head form into horn (not actually simple but probably easier than reforming its skull). You could use goat DNA to make this gene, though anything you do will make your horse look strange after altering.

Your unicorn would look even more weird were you to go with the narwhal approach, though the horn would be he right shape. To be more specific, the male narwhal, when mature, has its front-left tooth grow forward, through the top of its lip and out in-front of its body, less charming then the usual illustrations you see. This would actually be, maybe the easiest way to give a horse a 'horn', though its a tusk, even if it looks absolutely stupid.

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  • $\begingroup$ Thanks for that - I hadn't realised that a narwhal's horn was a modified tooth (tusk) - that would be one damn ugly horse!! and a Health and Safety nightmare!!! $\endgroup$ Oct 15 '15 at 13:28
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    $\begingroup$ I read this question and immediately imagined a horse with a full-sized narwhal tusk sticking out the front of its face. I think it's a fine idea! $\endgroup$
    – ckersch
    Oct 15 '15 at 18:04
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    $\begingroup$ It would bring whole new meanings to the old idea of checking a horse's quality by looking at its teeth. $\endgroup$
    – Simba
    Jul 25 '17 at 15:02

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