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
Aedes africanus virus, West Nile virus, and Rift Valley fever virus. It is also a vector of Zika virus, the causal agent of Zika fever. Aedes africanus Aedes africanus is a species of mosquito that is found on the continent of Africa with the exclusion of Madagascar. "Aedes aegypti" and "Aedes africanus" are the two main yellow fever vector species in Zambia. "Aedes africanus" is mainly found in tropical forests not near wetlands. This mosquito has distinct white and black stripes along its body which help differentiate the genus from others in this family. Females of this species are ectoparasites and can