so changes in your genotype will cause a change in your phenotype. if your genotype is EXACTLY the same as someone else's, then the only thing causing a change in your appearance will be the environment you live in.
with that being said, just analyzing the genotype portion, of course as humans, we have overall features of our genome that everyone in the species share. for example, this includes the genes that encode for everyone having 2 eyes, a nose, a mouth, etcetc. however, we know each of us look different from one another, and genomically, this due to polymorphism. this is where the sequence differences, duplications, deletions, insertions, location and the number of transposable elements each of us contain are held accountable for our individual appearance.
...studying for my genetics course. trying to make some use of my procrastination time.. productive procrastination haha..
