You know teh google can be your friend.
http://lmgtfy.com/?q=evidence+of+genetic+evolution
“Genetic evidence for evolution
If there is evolution, is there any evidence for it at the genetic level?
The answer is yes. Scientists who have been studying genetic changes occurring in the human genome over the last 15,000 to 100,000 years, have found that over this relatively short period of time the human genome has changed by as much as 10 percent”
Just an example of one of the 2,050,000 hits I got in 0.28 seconds
By the way you know it would be impossible to find 50% of a species as fossils. You really should study up on fossilization and how really rare it is, lest you make your self look foolish by moving to goal post to a completely unattainable distance.
But that’s completely missing the point.
The speculation of evolutionary theory suggests that changes in genotype lead to changes in phenotype, and the only way to prove it scientifically is to produce at least a written description of those changes. The changes you mention are not positively linked to changes in phenotype.
Not only are we unable to describe what specific changes in genotype mark the difference between habilis, erectus or sapiens. We have no evidence of what supposedly came in between.
If habilis evolved into erectus, according to Darwinian theory it was a very gradual change, one random mutation at a time.
This means the phenotypic changes would have been very small over a long period, and that the generosity of chance would have necessarily provided the fossil evidence of the in between species. I don’t mean 50% of volume, but 50% of variety. The absence of variety applies across the board to every kind of animal—the fossils just aren’t there.