Dzo Dzo A dzo (Tibetan མཛོ་ mdzo) (also spelled zo, zho and dzho) is a hybrid between the yak and domestic cattle. The word dzo technically refers to a male hybrid, while a female is known as a "dzomo" or "zhom". In Mongolian it is called khainag (хайнаг). There is also the English language portmanteau term of yattle, a combination of the words yak and cattle, as well as yakow, a combination of the words yak and cow. Dzomo are fertile (or, fecund) while dzo are sterile. As they are a product of the hybrid genetic phenomenon of heterosis (hybrid vigor),
Amdo of the wild yak and the kiang. Domesticated animals of the region consist of the domestic yak and dzo, goats, sheep, and the Mongolian horse. In historical times, the people of the region were typically non-Tibetan, such as Mongols or Tibetan speakers of non-Tibetan origin such as the Hor people. The Tibetan inhabitants of Amdo are referred to as Amdowa (; amdo pa) as a regional distinction from the Tibetans of Kham (Khampa) and U-Tsang (Central Tibet), however, they are all considered ethnically Tibetan. Today, ethnic Tibetans predominate in the western and southern parts of Amdo, which are now administered