Why are zonkeys usually sterile?

Female hybrids are rarely fertile and male hybrids are usually sterile. Boo. A zonkey by any other name. read more

Zonkey's are usually sterile because the Zebra and the Donkey just weren't supposed to mate. But when kept in captivity together, they have no choice come mating season. The Zonkey just doesn't have the proper chromosomes or cells to reproduce. read more

The definition of speciation is when one species splits in two because their genomes, usually when there is some kind of barrier to homogenous mixing of genes within the entire population, with different environmental conditions on either side). read more