There are great genetic benefits to hybrid vigorish heritages, Although I don't think that's why
My ancestors played around with Neanderthal's.
Speaking as a Cro-magnon, I have to say that Neanderthal women make the best wives. A Cr-magnon male can lay with A Neanderthal woman dozens of times without making them pregnant. So less female infanticide is necessary. They have extra strong teeth, useful for softening leather and cracking nuts. They don't talk as much as Cro-magnon women, though they do wave their hands around a great deal. They stand up to cold weather better than Cro-magnons.
When they do get pregnant, their offspring are very tough. They resist diseases better, both Cro-magnon and Neanderthal.
The percentage of still births in a cross are slightly higher than the percentage of still births in a purebred line. However, who notices such things. The percentage of still births is high anyway.
Neanderthalls have lighter skins than Cro-magnon, maybe. We Cromagnons moved out of Africa later than the Neanderthal, so we have retained our equatorial adaptations. So this means Neanderthals, and their children, have fewer cases of scurvy (vitamin D deficiency). Very important in these Northern climates that we Cro-magnon moved into.
The Neanderthal women like Cro-magnon men because Cro-magnons don't suffer from vitamin B deficiency as much as Neanderthal. Sunlight destroys vitamin B. Vitamin B deficiency damages the nervous system. So it is true that Neanderthals generally aren't as sharp as Cro-magnon in their mountain homes. However, there is less sunlight in the valleys. So Neanderthal women get a little sharper when they have lived with us for some time. They get a little dangerous. More on that later.
You may find the economics interesting. We Cromagon, who live at the base of the mountains, regularly trade with Neanderthal who live at the top. This geographic division, based on climate preferences, minimizes the competition. However, the Neanderthals like use practice female infanticide. However, Cro-magnon like Neanderthal women.
So the Neanderthal often keep their female infants just to trade with us. We give them high tech spears and they give us Neanderthal women. Neither of us don't trade male offspring, though. We mostly euthanize the females of our own tribe.
So future generations may get the false impression that Cro-mangons wiped out the Neanderthal men and rapped the women. Nothing can be farther from the truth! The fact is only that the males are not traded. Female infanticide has enriched the mitochondrial DNA of the hybrids.
The main disadvantage is that Neanderthals have more upper body strength than Cromagnon. So it is rather hazardous to beat Neanderthal babes. We Cromagnons run faster than Neanderthal, though. The Neanderthal women get smarter. They pick up some of the high tech we Cro-magnon have.
So when we get a Neanderthal woman angry, we generally go hunting for a few days. However, we are welcomed back with great warmth.
The hybrids generally prefer to hand out in the middle altitudes of our mountain range. There is strangely less genetic variation among the hybrids than among either purebred group. Many recessive dominant exclusive to the purebred groups are hidden by the dominant alleles. Essentially, they all look like Michal Jackson. They sing like him too. Their top hit is 'Lets party like it is 100 KYA.'
I worry that the half breeds may replace both purebred groups. I guess that would be okay, except it favors Neanderthal genes. By Haldane's Law, they are more fertile crossing with their mothers than with their fathers. So a hybrid is more likely to have children with purebred Neanderthal mothers than purebred Cromagnon mothers. However, I I think there will always be a market for red heads. So Cromagnon with Neanderthal genes isn't THAT horrifying.
I recommend Neanderthal chicks for all your marital needs. I bought two, and I have never been sorry!