where did it get its name from?
From Spanish "rodeo" (meaning "round up") which in turn comes from "rodear" (meaning "go around").
Rodeo
The American English word "rodeo" is taken directly from Spanish "rodeo" (), which roughly translates into English as "round up."

The Spanish word is derived from the verb "rodear," meaning "to surround" or "go around," used to refer to "a pen for cattle at a fair or market," derived from the Latin "rota" or "rotare," meaning to rotate or go around.
what is dominant white? A.k.a  white spotting -  group of genetically related coat color conditions in the horse, best known for producing an all-white coat. how is this identifed? UNANSWERABLE what is its relation to sabino? It is a group of white spotting patterns in horses that affect the skin and hair. how are these animals domesticated? The clearest evidence of early use of the horse as a means of transport is from chariot burials dated c. 2000 BCE do they have a sleeping pattern? They are able to sleep both standing up and lying down; and are able to enter light sleep by using a "stay apparatus" in their legs, allowing them to doze without collapsing. can you tell me about their skeletal system? Its skeleton averages 205 bones, significant difference from human skeletons is the lack of a collarbone. what is this apparatus you mentioned above? It is a group of ligaments, tendons and muscles which "lock" major joints in the limbs of the horse. in what all sports is this animal used? Show jumping, rodeo, sport hunting, horse racing etc. what is the second one about? It is a competitive equestrian sport that arose out of the working practices of cattle herding in Spain and Mexico.
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Rodeo [SEP] Etymology
The yearly rodeos for separating the cattle were overseen by the "Juez del Campo," who decided all questions of ownership. The term was also used to refer to exhibitions of skills used in the working "rodeo". This evolved from these yearly gatherings where festivities were held and horsemen could demonstrate their equestrian skills. It was this latter usage which was adopted into the cowboy tradition of the United States and Canada.