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 Fabius Maximus Africanus' earliest post was as a military tribune in Spain, though this is not certain. His only two certain civilian posts were as ordinary consul in 10 BCE (with Iullus Antonius), and as proconsul of Africa in 6/5 BCE. He was admitted to the priesthood of the "septemviri epulonum" at some point after 25 BCE. It was during his tenure as proconsul of Africa that Africanus struck some coins that bore his own image. Although no wife is attested for Africanus, it is possible that he had a daughter named Fabia Numantina. Alternatively, she may have been the daughter of