Hinny sixty cases of foals born to female mules around the world have been documented. In contrast, according to the ADMS, there is only one known case of a female hinny doing so. Namely, in China, in 1981, a hinny mare proved fertile with a donkey sire. When the Chinese hinny was bred to a jack, she produced the so-called "Dragon Foal", which resembled a donkey with mule-like features. In Morocco, in 2002, a mule mare bred to a donkey sire produced a male foal. DNA testing revealed the foal has a mixed karyotype hybrid like the Chinese hinny offspring "Dragon
Social groups in male and female prisons in the United States point. This difference is a manifestation of gendered social factors which influence male and female populations within prisons and within larger society. The populations and demographics of male and female inmate populations in the US are very different from one another. These differences factor heavily into theories on prisoner social organization. The most significant difference is in the relative size of male and female populations; in 2014 there were approximately 1,440,000 male and 112,000 female prisoners in the United States. The much larger size of the male prison population causes major differences in the institutions in which male and female