Fruit flies are commonly used in genetic investigations that focus on traits passed from parents to offspring over several generations. What can you infer is the reason fruit flies are the most commonly used organism for this type of investigation? (5 points) 1. Many more generations can be studied using short-lived organisms.

2. Scientists prefer to study what has previously been studied.

3. Society does not have ethical issues with lab-kept fruit flies.

4. Fruit flies are relatively inexpensive.