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How to do scientific experiments using fruit flies
Contributed by: Simpson
  • 1. What is the scientific name for the common fruit fly used in experiments?
A) Apis mellifera
B) Musca domestica
C) Drosophila melanogaster
D) Caenorhabditis elegans
  • 2. Why are fruit flies a good model organism for scientific research?
A) Short life cycle and easy to breed
B) Complex genome similar to humans
C) Large size and ease of handling
D) Resistance to environmental changes
  • 3. What is the approximate life cycle length of a fruit fly at 25°C?
A) About 10 days
B) About 60 days
C) About 30 days
D) About 1 day
  • 4. Which of the following is NOT a common food source for fruit flies in the lab?
A) Yeast
B) Raw meat
C) Instant potato flakes
D) Cornmeal-molasses agar
  • 5. How can you distinguish between male and female fruit flies?
A) Females are smaller than males
B) Males have pointed abdomens
C) Females have darker eyes
D) Males have sex combs on their front legs
  • 6. What is the purpose of 'etherizing' fruit flies?
A) To kill them for preservation
B) To sterilize them for breeding
C) To accelerate their development
D) To temporarily anesthetize them for observation
  • 7. What type of microscope is typically used to observe fruit flies?
A) Compound microscope
B) Atomic force microscope
C) Stereomicroscope
D) Electron microscope
  • 8. What is the significance of balancer chromosomes in fruit fly genetics?
A) They promote rapid development
B) They increase mutation rates
C) They prevent crossing over in specific regions
D) They change the sex of the flies
  • 9. What does 'P element' refer to in fruit fly genetics?
A) A protein involved in eye development
B) A method of anesthesia
C) A type of food source
D) A transposable element used for gene manipulation
  • 10. What is a 'stock' in the context of fruit fly research?
A) A measurement of fly size
B) A type of fruit used for food
C) A population of flies with a specific genetic background
D) A container for holding flies
  • 11. What is a common method for creating mutant fruit fly lines?
A) Selective breeding of large flies
B) Exposing flies to loud noises
C) Feeding flies different colored food
D) Chemical mutagenesis
  • 12. What is meant by 'crossing' flies?
A) Measuring the length of a fly's wings
B) Moving flies between different containers
C) Counting the number of flies in a population
D) Mating two flies with different genetic backgrounds
  • 13. What is a 'virgin' female fruit fly?
A) A female that lays infertile eggs
B) A female that has not yet mated
C) A female with a specific mutation
D) A female that is unusually large
  • 14. Why is it important to collect virgin females for certain experiments?
A) To control the genetic background of the offspring
B) Because they are more resistant to diseases
C) Because they lay more eggs
D) Because they are easier to handle
  • 15. What is the purpose of a 'vial' in fruit fly experiments?
A) A tool for anesthetizing flies
B) A small container to house and breed flies
C) A device for measuring fly speed
D) A type of food supplement
  • 16. What is the significance of 'eye color' mutants in fruit fly genetics?
A) They are more attracted to light
B) They develop faster than wild-type flies
C) They are more resistant to pesticides
D) They are easy to identify and track genetic crosses
  • 17. What is a 'balancer' chromosome used for?
A) Maintaining heterozygous genotypes
B) Increasing mutation rates
C) Improving fertility
D) Changing the sex ratio
  • 18. What is 'crossing over'?
A) Exchange of genetic material during meiosis
B) A type of fly food
C) A way to measure fly activity
D) A method of anesthesia
  • 19. What is meant by 'F1 generation'?
A) A type of fly food
B) The first generation of offspring from a cross
C) A tool for sterilizing flies
D) A measurement of fly size
  • 20. What is meant by 'F2 generation'?
A) A specific type of mutation
B) A method to induce sleep in flies
C) A technique to analyze fly behavior
D) The second generation of offspring from a cross
  • 21. What does 'wild-type' refer to in fruit fly studies?
A) A fly with many mutations
B) A fly that is resistant to pesticides
C) A fly that can survive in extreme conditions
D) The normal, non-mutated phenotype
  • 22. What is a common application of fruit fly research?
A) Developing new pesticides
B) Creating new types of fruit
C) Studying human diseases
D) Improving bee colony health
  • 23. What is the best temperature range for most fruit fly experiments?
A) 30-35°C
B) 10-15°C
C) 5-10°C
D) 22-25°C
  • 24. What is the recommended humidity for fruit fly cultures?
A) 80-90%
B) 0%
C) 50-60%
D) 10-20%
  • 25. What is 'gene mapping' in fruit fly research?
A) Modifying fly genes for food production
B) Determining the location of genes on chromosomes
C) Analyzing fly behavior in different environments
D) Counting the number of genes in a fly genome
  • 26. What is the purpose of using a 'fly morgue'?
A) To provide a dark environment for fly sleep
B) To collect dead flies for disposal and analysis
C) To keep flies warm during cold weather
D) To store food for the flies
  • 27. What is optogenetics used for in fly research?
A) Measuring the size of fly organs
B) Controlling neuron activity with light
C) Analyzing the chemical composition of fly food
D) Creating different colored flies
  • 28. What is a common method for sterilizing fruit fly vials?
A) Freezing
B) Using bleach
C) Microwaving
D) Autoclaving
  • 29. What is the purpose of adding antifungal agents to fly food?
A) To make the food more attractive to the flies
B) To kill any bacteria in the food
C) To provide extra nutrients for the flies
D) To prevent mold growth
  • 30. What type of anesthetic is most commonly used when anesthetizing flies?
A) Ether
B) Propofol
C) Carbon Dioxide (CO2)
D) Halothane
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