Reproductive isolation from a cross between a horse and a donkey or between a mare and a donkey, respectively. These animals are nearly always sterile due to the difference in the number of chromosomes between the two parent species. Both horses and donkeys belong to the genus "Equus", but "Equus caballus" has 64 chromosomes, while "Equus asinus" only has 62. A cross will produce offspring (mule or hinny) with 63 chromosomes, that will not form pairs, which means that they do not divide in a balanced manner during meiosis. In the wild, the horses and donkeys ignore each other and do not
Equus (film) mother's deity with a god he called Equus, incarnated in horses. Frank discloses to Martin that he witnessed Alan late at night in his room, haltered and flagellating himself, as he chanted a series of names in Biblical genealogy-fashion which culminated in the name Equus as he climaxed. Martin begins winning the respect and confidence of Alan, who shares his earliest memory of a horse from when he was six and a man approached him on a horse named Trojan. Alan imagined the horse spoke to him, and said his true name was Equus, and this was the name of