Explain why a mule, a product of mating between a horse and a donkey is sterile?

Answer 1

Because they are not of the same species.A species is the smallest taxonomic unit of classification whise members can naturally interbreed to produce a fertile offspring.

Answer 2

Whose*

Answer 3

They belong to the same genus but are not of the same species therefore they naturally intebred but did not produce fertile offspring