crossbreed

(noun) (genetics) an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or animals of different varieties or breeds or species. Synonyms: hybrid, cross. Example: "A mule is a cross between a horse and a donkey."

(verb) breed animals or plants using parents of different races and varieties. Synonyms: cross, hybridize, hybridise, interbreed. Examples: "Cross a horse and a donkey." "Mendel tried crossbreeding." "These species do not interbreed."