"The genes in the human body are like programs on the television," explains Yang. "Some are switched on and some are switched off." For the heart, for example, there may be 30,000 genes "switched on" with the remainder "switched off," whereas a separate 20,000 may be "on" for the stomach.
「人體內的基因就像電視節目一樣，有的開、有的關」，楊文光舉心臟為例，假設心臟的基因裡有三萬個是開著的，其餘都關著沒有作用，胃可能是另外二萬個基因開著，其餘的關閉。