germ line theory

例句：

1. 1.The germ line theory suggests that genes are passed down from parents to their children.
   遗传学原理表明，基因从父母传给子女。
2. 2.The germ line theory has been a subject of much debate in the field of genetics.
   遗传学领域一直对遗传学原理进行着激烈的讨论。
3. 3. The germ line theory has led to significant advancements in the field of medicine.
   遗传学原理在医学领域取得了重大进展。