Your genes are the instructions for building your body and they tell your body how to work. They determine things like your eye colour, your height or your risk for a health condition.
Most genes come in two copies, one inherited from your mother, the other from your father.
Generally, these genetic differences are part of normalhuman variation, and each person’s genome contains millions of these variants.
However, sometimes genetic variants can disrupt the normal function of genes and cause health problems.
Your genes are just one element that contributes to your appearance, your body function, or your risk of developing a condition. Your diet, lifestyle and environment also come into play.