A son does not have the same DNA sequence as his father. Nor does he have the same DNA sequence as his sibling - unless he is an identical twin.
All I am pointing out is that the DNA sequence that is unique to every person - is bestowed upon them at conception.
I know I am not using specific scientific terms you would like me to use....My posts on this thread started over where we should place the “beginning” of a human life....at conception - or at implantation.
But my point is that their unique DNA sequence (or fingerprint) is NOT bestowed upon them at conception - the only thing that happens upon conception is that the two halves are made whole.
My wife is 9 months pregnant. Half of the unique DNA sequence of my daughter was made in the days before conception in my testes when I made the sperm that fertilized my wife’s egg; and the other half was made when my beloved wife was inside HER mother when she made the egg that I fertilized.
What happened at conception was that these two unique DNA sequences (one that was made a couple days before, the other that was made decades ago) were finally combined in physical proximity within the same plasma membrane of the fertilized egg.
Nothing special has to happen to the DNA for a unique human life to begin at conception, that is my other point.
The only thing that happened nine months ago to my daughter’s DNA was that my half was put in physical proximity to the half my wife provided.