Cross-species is a term used to describe the interbreeding of two different species, resulting in a HYBRID offspring. The term can also be used to describe the transfer of genetic material between two different species. Hybrids are created when two different species mate and produce offspring that have characteristics from both parents. Hybrids are usually sterile, meaning they cannot reproduce. Cross-species breeding has been used in agriculture and animal husbandry for centuries, and is now being used to create new varieties of plants and animals.