I recall saying B'Elanna was never a lizard, so why are you arguing that?
As for the rest of this... I have absolutely no idea where it's coming from.
I just have a problem with the notion that a mammal and reptile can mate and produce viable offspring. If you have any links that say otherwise, please post them.
1) Lizards are reptiles. But not all reptiles are lizards.
2) We have no idea whether the reptilian species on another planet would or will reproduce the same way they do on Earth.
3) The whole point is that Star Trek establishes that such reproduction is possible. We may not accept the viability of such IRL, but we have no business objecting to it on the show. That's just saying the writers got it wrong when the writers came up with the idea. Which is nonsense.