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