Donkey of Asiatic wild ass or onager, "Equus hemionus", and three subspecies of the kiang, "Equus kiang", of the Himalayan upland. A male donkey (jack) can be crossed with a female horse to produce a mule. A male horse can be crossed with a female donkey to produce a hinny. Horse-donkey hybrids are almost always sterile because horses have 64 chromosomes whereas donkeys have 62, producing offspring with 63 chromosomes. Mules are much more common than hinnies. This is believed to be caused by two factors, the first being proven in cat hybrids, that when the chromosome count of the male
Social groups in male and female prisons in the United States gangs, which are initially formed to provide protection to their members, as these members can no longer rely on norms or correctional officials to do the same. While homosexual contact is common in both male and female prisoners, female inmates tend to emphasize an emotional connection, sometimes displaying affection without any intention of sexual contact, male inmates tend not to display any affection despite frequent sexual interaction. This phenomenon is caused partially by the extreme stigmatization of homosexuality in male prison populations. Prison conditions encourage young male inmates to emphasize their masculinity, causing participants in homosexual relationships typically explain their