@golemwire @david_chisnall You are so wrong you fail biology forever.
You might have heard that all humans don’t have the exact same gene sequences. There is also not a straight line from gene sequences to protein production and then phenotype. If there was, we would always be producing all proteins full speed all the time.
The existence of intersex people disproves you in the easiest way possible, but there are more subtle ways things can vary.