Genetics and Human Brain Evolution

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The one thing that has fascintaed me about all of this is the intensity everyone from a freshman Biology 101 student to a PHD has in common is that they find creationism detestable.

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That's because creationism is antiscientific, it rejects much of what we know about biology, geology, astronomy, chemistry, and even physics.

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What I don't buy is the constant unsubstantiated assertion that genetics and single common ancesotry blends together in dovetail fashion.

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That doesn't stop anyone of you from preaching common ancestry like it's an inerrent canon of biology.

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If genetics proves heredity for parents and children why is it so hard to extrapolate that to species and so on? Especially when fossil and comparative physiological evidence backs up those conclusions. The redundancy of the amino acid code is actually one of if not the strongest evidences for common ancestory because it results in a situation where design is irrelevant because the codes are functionally redundant. The more similar your protein sequences are, the more closely related you are.

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I only ask because the LCA was supposedly 5-7 mya and our ancestors did not actually leave Africa until about 1.5 mya.

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Fossil, genetic, and molecular biological evidence puts the common ancestor of all modern humans in africa about 70kya. The human brain would have had to reach its modern size and capacity around this time, certainly before the first migrations from africa. The 1.5 mya figure may have to do with the migrations of homo erectus which spanned much of africa, europe, and asia. These would have been relatives of our ancestors but not our direct ancestors.

What does the science behind mutation events and human brain evolution have to do with having no morality? If you address the people and not the arguements that's called an ad hominem which has no place in a discussion. If you want to contribute to the discussion then address the scientific arguements presented thus far.

I have only a passing knowledge of genetics and protein sequencing so i did a quick google scholar search and found a paper on the sequencing of a gene that contributes to brain growth.
Here's the link:
Evolution of the Human ASPM Gene, a Major Determinant of Brain Size | Genetics | Oxford Academic
Here's the title:
Evolution of the Human ASPM Gene, a Major Determinant of Brain SizeI'll try to interperet as best as I can. The gene they work on is ASPM, abnormal spindle-like microcephaly associated. They give a figure Dn/Ds which is the ratio of nonsynonymous nucleotide substitutions to synonymousu substitutions. It is used to compare humans, chimpanzees, and orangutans, the numbers are 1.03, 0.66, and 0.43 respectively. I really don't understand the rest of it, maybe someone else can.