Vampire Aliens? Supernatural hybrids? [answered]

I do wonder what would happens.

I know for Having a baby together it's more likely to be one or the other.

I feel like when a Human has a baby with any life state, the Life state's genes should be dominant and the Human Trait, Recessive.
but what about mixing other life states that aren't human? I wonder what'll be more dominant over the other, or if it's just going to be a random chance.