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 Southwest. She found that officers consistently expressed a preference to work in men's prisons, citing differences between male and female inmates as the main cause; officers perceive female inmates to be more difficult to manage, more likely to question an instruction, and less respectful than males. Many respondents also characterized female inmates as more emotional and therefore more likely to become inexplicably violent, while male violence is rationalized as having understandable goals. In this way, female violence is seen as irrational and ineffective whereas male violence is seen as meaningful and understandable. Britton notes that these perceptions seemed to be