Walter L. Wagner
Yes, we knew that MDNA was inherited only from the mother in 1970, but it was only in the late 90s that it was shown that every human being was descended from a small group(MAYBE even just one woman)200,000 years ago. It is one thing to know genes create traits, a whole 'nother thing to trace it back so precisely with so much confidence. It's like leopold's cited paper, in 1983 we had a vague sense of molecular evolution while today we can say quite a bit about it with excellent confidence. Today you will hear little of the strident argument like Gould and Lewin put forward for PE, we know that PE is just another rate of evolutionary change and that Gould and Lewin overshot the mark in their claims and arguments. Changes over a few thousand generations means there will be few fossils showing that progress, we see the beginning and the end points, but few in the middle, there simply wasn't time to generate sufficient numbers of fossils, if any at all.
Grumpy
Actually, we knew that (mitochondrial inheritance via the female only) in 1970 and earlier
Yes, we knew that MDNA was inherited only from the mother in 1970, but it was only in the late 90s that it was shown that every human being was descended from a small group(MAYBE even just one woman)200,000 years ago. It is one thing to know genes create traits, a whole 'nother thing to trace it back so precisely with so much confidence. It's like leopold's cited paper, in 1983 we had a vague sense of molecular evolution while today we can say quite a bit about it with excellent confidence. Today you will hear little of the strident argument like Gould and Lewin put forward for PE, we know that PE is just another rate of evolutionary change and that Gould and Lewin overshot the mark in their claims and arguments. Changes over a few thousand generations means there will be few fossils showing that progress, we see the beginning and the end points, but few in the middle, there simply wasn't time to generate sufficient numbers of fossils, if any at all.
Grumpy