When editing DNA, how does an organism know to replicate the edited DNA vs. the non-edited DNA?

Question

When editing DNA, how does an organism know to replicate the edited DNA vs. the non-edited DNA?

In: Biology

Answer 1

You insert the gene of the thing you want to make close to genes the organism makes a lot of anyways. This way it just gets carried along with the ride. For example say you want to make insulin. Stick the insulin gene right after the lactase gene in E. coli and stick the bacteria in a high lactose environment. It will make insulin along with lactase.