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 George Africanus George John Scipio Africanus (c. 1763 – 19 May 1834) was a West African former slave who became a successful entrepreneur in Nottingham. The early life of George Africanus is obscure. Calculating his birth year from his burial certificate, he was probably born in 1763. His obituary in the "Nottingham Review" of 30 May 1834 states that he was born in a village in Sierra Leone, which became a British colony in 1787. It is believed that George arrived in England in early 1766. On 31 March 1766, he was baptised George John Scipio Africanus, and described as