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
Hyundai Equus only Tau 4.6 MPi for the 2011 model (390PS) engine. The Tau 5.0 GDi was from 2012 forward. All models included ZF 6-speed automatic transmission with SHIFTRONIC manual control. 2012 model vehicles include 8-speed automatic transmission, introduction of GDI engines. It was also revealed that the Hyundai Equus will be receiving a 5.0L V8 with and . This engine will be an option for the Equus after January 2011. This engine will also be placed in the facelifted 2012 Hyundai Genesis. Korean models went on sale in 2012. It is a limited (3 units) version of 2013 Hyundai Equus limousine