In reproduction, I understand that there is a shuffling of the information that is being expressed so that what is expressed in you is not necessarily expressed in your children and could be expressed in your grandchildren. The point being is that the information is not lost.
The point is that since we are *copies* of our ancestors, there will be no extraneous instructions in our genome such as we do find in chimps. *Until you can show how volumes of instruction got there or how we got (vast amounts) of instruction that chimps do not have, you cannot claim that we have an ancestor in common with chimps.*
Both chimps and humans have extraneous instruction that the other does not have so we are not copied from the same "common ancestor". We do not have an ancestor in common with chimps. It is that simple. (It's not complicated.)
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