Fruit Flies: aka Drosophila Melanogaster

Derek Rhea and Jadyn Bellah

A fruit fly landing on what appears to be an orange.

Fruit flies are known by scientists to have 75% of the genetic makeup that cause human diseases, so in turn, scientists learn more about the human genetic makeup.

Fruit Fly Life Cycle

*Adults Characteristics: Tan and Black, Red protruding eyes. The typical life span is 40-50 days.

*Eggs commonly laid in overripe fruit, laying up to 500 eggs at a time. Eggs typically stay in the fruit for 4-5 days.

*Typically lives in warm and humid areas, originating from the tropical Old World

*Although they can be found inside year round, they only survive outdoors during warm weather

*Fruit flies typically eat near the surface of fermenting foods or other moist organic materials. They also enjoy eating decomposing foods such as rotten fruit and mushrooms.

The Experiment:

How does the type of fruit affect the response from fruit flies?


If the type of fruit is an orange, then the fruit flies will be more attracted to it.


Fruit flies

2 empty water bottles


1 Banana

1 Orange

* = Done already


  1. *Cut the wide ends of the two water bottles off
  2. *Tape them together
  3. Lock fruit flies in water bottle container
  4. Open orange and banana peels
  5. Unscrew lid and place either fruit at their respective ends
  6. Observe the flies to which end they go to
  7. Record observations

The hypothesis, "If the type of fruit is an orange, then the fruit flies will be more attracted to it", was supported by the experiment. The flies preferred the orange over the banana 4-1. This was connected to our past research as we knew fruit flies preferred moist fruit over dry fruit. One possible error was that a fly was crushed by the weight of the orange piece. Another possible error could have been the flies weren't at the center of the bottles. A final possible error could be a miscount, and that a fly moved from it's original choice.

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