If participants have done Activity 3.1, explain that genetic engineering involves moving genes between living things. That changes their offspring's traits. To expand on this experiment, make one recipe of bread sticks with the yeast, and another without. Let children predict what will happen. It has been used for centuries to make things, including beer and bread using yeast.
Genetic engineering is a new biotechnology.
It uses molecular tools to move genes from one organism to another, changing one or more traits of the recipient organism. Let stand until it starts to bubble. This indicates that the yeast is starting to grow and multiply. After about 10 minutes, stir in the oil, milk, and salt. Turn dough onto a lightly floured surface.