# Genetic engineering

Moving a gene from one organism into another to give it a new feature.

Biology (school) · Part 06: Variation and evolution · Card 10 of 11 · Last updated 2026-10-19

## Analogy

Copying one recipe from one cookbook into another.

## In practice

Bacteria with a human insulin gene make insulin for people with diabetes.

## Questions people ask

### How does genetic engineering work?

Scientists cut out the useful gene using enzymes. They insert it into a vector such as a bacterial plasmid or virus, which carries it into the new organism's cells. The cells then make the new protein. Insulin, and crops that resist pests, are made this way.

### What are the pros and cons of GM crops?

Benefits include higher yields, resistance to pests or drought and added vitamins. Concerns include possible harm to wild plants or insects, farmers depending on seed companies, and worries about eating GM food, although approved foods are tested. People often disagree on how to weigh these points.

## Related concepts

- [Selective breeding](https://studyvisually.com/learn/science/biology-school/biology-school-part-6/biology-school-part-6-concept-9)

Web page: https://studyvisually.com/learn/science/biology-school/biology-school-part-6/biology-school-part-6-concept-10
Study this card in the app: https://studyvisually.com/app/learn?category=biology-school&card=biology-school-part-6-concept-10