by 
HungryGuy
ANSWERS: 4
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All the following animals are mammals and members of the Equidae family (also known as Equids or Horse Family): E. asinus - Donkey E. caballus - Domestic Horse E. grevyi - Grevy's Zebra E. hemionus - Onager E. przewalskii - Przewalski's Horse E. quagga - Plains Zebra E. zebra - Mountain Zebra So as you can see their anatomy and classification is the same, varying only in sizes, fur color and behavior due to their different environment. So basically, a horse and a zebra are different in aspect.
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Visually, besides their stripes, a zebra can also be identified by: 1- Their body shape is more like that of a donkey than a true horse, to varying degrees based on the species of zebra 2- They have a solid tail, with stripes on it and tufts of hair, as opposed to the horse's all-hair tail. The tail is the easiest way to tell the difference between a zebra and a painted horse. If you see a striped animal with a flowing tail of hair, it's a horse, and you're probably watching a movie where someone has to ride the thing. Zebras don't have a temperment like horses, so Hollywood has a history of painting horses when a zebra is needed.
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There are considerable genetic differences between horses and zebras, and donkeys as well. Most of the DNA is extremely similar, however the chromosome number varies widely (due mostly to centromere repositioning); horses have 32 pairs of chromosomes, for a total number of 64 chromosomes, while zebras have 16 pairs of chromosomes, for a total number of 32 chromosomes. Just for comparison, the last breed of purely wild-type horses, the Przewalski's Horse, have 33 pairs of chromosomes for a total of 66, and donkeys have 31 pairs of chromosomes for a total of 62.
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Here's a good comparison for you! A horse and a zebras are both equines. A dog and a wolf are both canines. Make sense?
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