Biology
Genetics
Fruit Fly power point Study guide
Name ______________________________
-Be kind whenever possible. It is always possible
-Dalai Lama
1. Why is it valuable to study the genetics of simpler, more primitive organisms?
2. List 5 reasons why the common fruit fly (Drosophila melanogaster) is used in genetic
research.
3. Describe the culture vials we will use for these fruit flies.
4. How will the culture medium be prepared?
5. On what chromosome is the black body (ebony) mutation located?
6. Describe the differences between the black body fly and the normal wild type fly.
7. What is the genotype for the black body (P1) fly? Why do we say that this genotype is
homozygous?
8. What does it mean when we say that the wild type (P1) flies are homozygous for that body
color?
9. If each parent can give just one gene to their offspring what would you expect the genotype
of the offspring (F1) to be?
10. If the ebony allele is recessive what would be the expected phenotype of the offspring
(F1)?
11. What are the four stages in the life cycle of a fruit fly?
12. We intend to do an F1 cross. Why is it important, then, to remove all of the Parent flies
before the F1 flies emerge?
13. How is FlyNap used to anesthetize the fruit flies?
14. How can you tell a female fly from a male fly?
15. When the F1 flies emerge we will anesthetize these flies and choose six males and six
females and culture these flies to get an F2 generation. What will that Punnett square cross
look like?
16. What are the expected genotype and phenotype frequencies for the F2?