what would a mathematical model of the time needed to generate the human genome look like"?
I think expecting to have your question answered before you asked it was... unreasonable.
If you want to assume that human genome was created completely from scratch, then perhaps it is okay to ignore calculations regarding lower life forms. But given that the theory of evolution is common descent, such an assumption would not address the theory of evolution as it is understood.
Under a government which imprisons any unjustly, the true place for a just man is also in prison. Thoreau: Civil Disobedience (1846)
The apathy of the people is enough to make every statue leap from its pedestal and hasten the resurrection of the dead. William Lloyd Garrison