例句與造句

1. The researchers say that by identifying a master switch gene for the formation of a flower's reproductive organs _ the plant parts that provide most of the world's food _ the new results will be of particular interest to agricultural scientists.
2. Although researchers now have evidence in hand that both Leafy and Apetala1 can act on their own as master switch genes that can set flowering in motion, it remains unclear how exactly these two genes normally interact in their high-level genetic managing.
3. It's difficult to find master switch gene in a sentence. 用master switch gene造句挺難的