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
George Africanus and labourer as well. Following his death in 1834, his wife Esther remained in the house and continued to run the family business. After she died on 12 May 1853, a notice appeared in the "Nottingham Review", stating: "Yesterday (Thursday), aged 85 years, Mrs. Africanus, for upwards of sixty years proprietor of the Servants' Register Office in Chandlers Lane." If this account is correct, then Ester ran the Servants' Register Office on Chandler’s lane from at least 1793. Africanus bought 28 Chandlers Lane and adjoining properties in Bluchers Yard for £380 on 24 October 1829. Africanus and his wife had