Where the hell did you study biology? Far and away, most genetic changes are neutral. Even deletion of entire genes usually results in no phenotypic change. Some organisms can double their chomosome set. Some can lose entire chromosomes with no ill effect. You never learned any of this? I am very curious to learn where you are attending medical school.
Cute. Straw man, smart guy, because I never said anything about "genetic changes" did I? Although you did a VERY good job of giving a different argument then what I gave followed by interesting points counter to an argument I never gave in the first place, not to mention a thinly vieled ad hominem personal attack about my medical and biological knowledge. What is this 3rd grade?
BTW, I attend one of the top medical schools in the country. Don't be jaealous and play nice now.