Chaochao, I tried to confirm that but got fed up with the search and just posted it. =P But anyway, I think everyone got the point.
Neanderthals. I'm pretty sure that you are wrong. If that was correct, we'd be like different genders of dogs, relatives as boxers and greyhounds are (ie. dark skin >< white skin). But I seem to remember thar Homo Sapiens and Homo Neandertalians couldn't reproduce. According to
wikipedia it seems that there are after all some result which indicate that it might have been possible. Anyway, their scientific name is Homo neanderthalensis. No sapienses in the middle. Hemm... Kinda like a wolf and a jackal. Same forefather, different outcome. More like brothers than a father and a son.