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
Julius Africanus Julius Africanus Julius Africanus was a celebrated orator in the reign of Nero, and seems to have been the son of the Julius Africanus, of the Gallic state of the Santoni, who was condemned by Tiberius in 32 AD. Quintilian, who had heard Julius Africanus, spoke of him and Domitius Afer as the best orators of their time. The eloquence of Africanus was chiefly characterized by vehemence and energy. Pliny the Younger mentions a grandson of this Julius Africanus, who was also an advocate and was opposed to him upon one occasion. He was consul suffectus in 108 AD. There