If you plant an apple seed, will you get an orange tree?
No. The biblical principle is that every seed produces its own kind; an apple seed can only yield an apple tree, not an orange tree. Hybridization may occur within limits, but there is no crossing from one totally different species into another, so the expected fruit matches the seed sown.
Les teaches that God gives each seed its own body, as it pleased Him, going back to Genesis where everything is confined to its own species. There is no crossing over from one totally different species into another. Although hybridization is possible, sowing an apple seed and expecting an orange tree just isn't going to happen. Everything follows in its own species. The same pattern is then applied to flesh, celestial and terrestrial bodies, and the resurrection of the dead: what is sown in corruption is raised in power.