http://www.xys.org/xys/ebooks/others/science/dajia10/fanyi13.txt
"genetics 的前半部分包含了gene，容易让人望文生义地误以为它是从“gene” (基因)一词演变而来的，而事实上它和“gene”毫无关系。"

字典上是如何解释的呢？
http://www.merriam-webster.com/dictionary/genetic
b: of, relating to, caused by, or controlled by genes <a genetic disease> <genetic variation>