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
Africanus Horton Africanus Horton Africanus Horton (1835–1883), also known as James Beale, was a Krio African nationalist writer and an esteemed medical surgeon in the British Army from Freetown, Sierra Leone. Africanus Horton was a surgeon, scientist, soldier, and a political thinker who worked toward African independence a century before it occurred. In his varied career, he served as a physician, an officer in the British Army, a banker, and a mining entrepreneur. In addition, he wrote a number of books and essays, the most widely remembered of which is his 1868 "Vindication of the African Race", an answer to the white