First of all, we got Xande which is a Roe with a "mutated" ear (genetics wise it could be normal Roe's ear shape at Allagan era), then those clones claimed they're being cloned from Xande's lineage which is definitely a Hyur? Those two clones didn't exhibit any Roe + Hyur characteristics, like the Aesthitician Ele + Hyur hybrid characteristics. To add more confusion, if our friend Gr'aha Tia's Allagan Eye is also a royalty trait, why the bloody hell he doesn't exhibit any Roe + Hyur + Miqote hybrid characteristics?

That cross breeding possibility, or the Allagan royalty trait is GENETICALLY ENGINEREED on selected individuals?