The DNA that makes up the genes in every cell of our bodies is virtually identical, but some people get ill while others don't. A big difference between them is whether specific genes have been activated or not.
人體內每個細胞的 DNA 幾乎完全一樣，但有些人會得病，有些人不會，一個很大的差別就在於個別基因有沒有被啟動？