The rate of polygenic and recessively inherited diseases tends to increase with inbreeding , because the chance that the two animals carry the same mutation is greater when the dogs are related 同系繁殖产生遗传病的比例比较大，因为关系较近的两只犬携带相同变异基因的可能性较大。
Various synthetic methods , such as chiral resolution , homology of l - amino acids , asymmetric alkylation , asymmetric alkylation of imines , and asymmetric hydrogenation of dehydroamino acids , introduced briefly 简要介绍了手性拆分、吞氨基酸的高同系化、不对称烷基化、亚胺的不对称烷基化、脱氢氨基酸的不对称氢化等各种合成方法。
The owner of an iowa meat company says tests have refuted government claims that his meat may have the same e . coli strain that killed three people in the recent spinach outbreak 政府声称，衣阿华州一家肉质品公司的肉产品可能含有的大肠杆菌与在最近的菠菜感染爆发期间导致3人死亡的大肠杆菌同系，但这家公司的所有者称测试结果表明政府的说法不正确。
