4 millions years ago? Really?! Are you sure you read right?
If my memory serves me right, Lucy, the Australopithecus, was dated to about 2 million years ago.
And the earliest Homo sapiens was about 200 thousand years ago.
Why A10 can't mate with A1? because its genetics became sufficiently different for incompatibilities to appear in the DNA... or something like that.
The first homo sapiens would have been able to mate with the population that gave birth to it. The homo sapiens traits simply gave it an edge that enabled its offspring to be more successful turning some genetic features of the previous population recessive, while the homo sapiens' became dominant.
I read somewhere that some people still have, nowadays, neanderthal genes running around.... recessive that have no influence, but they're still there.
If my memory serves me right, Lucy, the Australopithecus, was dated to about 2 million years ago.
And the earliest Homo sapiens was about 200 thousand years ago.
Why A10 can't mate with A1? because its genetics became sufficiently different for incompatibilities to appear in the DNA... or something like that.
The first homo sapiens would have been able to mate with the population that gave birth to it. The homo sapiens traits simply gave it an edge that enabled its offspring to be more successful turning some genetic features of the previous population recessive, while the homo sapiens' became dominant.
I read somewhere that some people still have, nowadays, neanderthal genes running around.... recessive that have no influence, but they're still there.
