基因是身体的生物单位,为身体提供功能指示。它们有脱氧核糖酸(DNA)构成,并确定个体的遗传特征。例如,一些基因将决定眼睛的颜色,而另一些基因则决定了一个人的身高。

Genes, being the building blocks of life, are also the basic units of heredity in living organisms.  It is the means by which all organisms pass on traits and attributes to their offspring.