[malakhi]

Genetic code does not allow reproduction outside of a species.

How do you define "species"? Are horses and donkeys different species? What about lions and tigers?

[NJ_gent]

"How do you define "species"?"

Organisms are said to be of differing species if their reproductive organs are functional, yet they're unable to produce viable offspring (meaning offspring which can then reproduce) due to genetic incompatibilities. At least that's what I was taught in high school - I suppose things could have changed a bit since then.