The mutations that makes your cell die will prevent you from being the first to the egg. The mutations that makes you immobile - the same. The mutation that m

The mutations that makes your cell die will prevent you from being the first to the egg. The mutations that makes you immobile - the same. The mutation that mess up with your instincts, and reactions to chemical enzymes - same (you won't go the right way). And so on. It's a little like unit testing - it checks all the basic routines.