Zebra "cutie marks" seem to be quite different than what a pony gets, as it would appear to be an abstract symbol rather than an image. Of course, we would need to see more zebras to know for sure. As for donkeys and mules, I would say that they lack the innate magic that ponies seem to have (though I have a theory that donkeys are actually very long lived to make up for it), and that magic is probably behind the cutie marks as well.
Plenty of the ponys have abstract cutie marks, so it's not really that different. Zecora's seems pretty similar to Celestia's in fact.
Element of Dullness.
I'm thinking that Equestrian ponies have a longer genetic sequence than donkeys and the extended part contains the genomes that govern their Racial Magic.
Then how do you interpret Zecora's mark? It looks like some sort of sun symbol, but how does that relate to who she is or where her talents lie?
I know next to nothing of equine biology, so I can't help you with the zebra/mule/donkey stuff.
Yeah, Andromeda is heading for you. You got over 9000 years until it collides.
@Ace
http://sta.sh/d263gbii01kx
Saw your post about Pony!Firefox, and couldn't resist
edited 14th Jun '12 8:21:13 AM by CrystalSuicune
Runs on nonsense and iced lemon tea
I guess you never took science class, Orion?