Final answer:
Streak plate subcultures separate mixed cultures into individual colonies. Transformed cells form distinct colonies, while the controls show individual colonies without transformation.
Step-by-step explanation:
In streak plate subcultures, the expected outcome is the separation of a mixed culture into individual colonies. The transformed cells will form distinct colonies that can be subcultured to make pure cultures. The controls will also show individual colonies, but they will not have undergone any transformation.
For example, if you streak a mixed culture with two different types of bacteria, you should see two different types of colonies on the streak plate. Each colony will contain a single type of bacteria.