Horse breed been produced. Such restrictions have led to legal challenges in the United States, sometime based on state law and sometimes based on antitrust laws. Horses can crossbreed with other equine species to produce hybrids. These hybrid types are not breeds, but they resemble breeds in that crosses between certain horse breeds and other equine species produce characteristic offspring. The most common hybrid is the mule, a cross between a "jack" (male donkey) and a mare. A related hybrid, the hinny, is a cross between a stallion and a jenny (female donkey). Most other hybrids involve the zebra (see Zebroid). With
Who is a Jew? horse and a donkey, and in both unions the offspring are judged matrilineally. Second, the Tannaim may have been influenced by Roman law, which dictated that when a parent could not contract a legal marriage, offspring would follow the mother. However Leviticus 24:11, Ezra 9-10, and Nehemiah 13 seem to indicate that matrilineal descent was recognized and patrilineal descent was rejected in Biblical times as well. All Jewish religious movements agree that a person may be a Jew either by birth or through conversion. According to "halakha," a Jew by birth must be born to a Jewish mother. "Halakha" states