Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared.

批评家们还争论说商业性基因检测的好坏取决于参照基因数据库的好坏。参照基因数据库是用来同样本进行对比的。

In the last paragraph, a problem commercial genetic testing faces is ().

在最后一段中，商业基因检测面临的一个问题是（）。

Analysing DNA sequences has now reached the public in the form of commercial genetic testing by companies such as Ancestry and 23andMe.

现在，DNA 序列分析已经通过 Ancestry 和 23andMe 等公司的商业基因测试形式进入公众视野。

14. Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared.

14. 批评者还认为，商业基因检测的效果取决于与样本进行比较的参考集合。