1.Which scientist is most noted for studying fruit flies to predict hereditary outcome? a.Darwin b.Watson and Crick c.Mendel d. Morgan e. Both Mendel and Morgan worked with fruit flies

2. When the fruit flies “eclose”, what exactly is happening? a. They appear to be eating the media b. They emerge from their pupal casings c. They emerge from the egg d. They are performing a mating ritual e. They become anesthetized and are able to be studied

3. After the eggs hatch, and the maggot stage is recognizable, they proceed through a series of three a. Instars b. Growth spurts c. Pupariations d. Complete metamorphoses e. Both a and b

4. Mendel’s Law of Segregation states a. that for each trait, each organism carries two factors b. that each of the organism’s gametes contains one and only one of these factors c. that each allele can code for multiple traits, once separated into gametes d. Both a and b e. All of the above

5.In the following dihybrid cross, which of Mendel’s laws is illustrated most? a. Law of Segregation b. Law of Unit Factors c. Law of Dominance/ Recessiveness d. Law of Sex-Linkage e. Law of Independent Assortment

6.How long after eclosion do female flies become sexually mature? a. 1-2 days b hours c. 24 hours d days e. 15 days

7.Why do we use blue media in our culture tubes? 8. Which of the following is a male ++ fruit fly, and what two visual clues helped you to determine that? b. c. d. e. a.

b. c. d. e. a. 9. Which of the following carries a sex-linked recessive trait? 10.What is the gender and genotype of the fly carrying the sex-linked recessive trait above? a. Female, wwd. Female ++ b. Male, wwe. Male X w Y c. Female, X w X w

***BONUS*** Why is the virginity of the female fly so important in your initial cross of the P 1 generation? ***DOUBLE SECRET BONUS*** Describe ONE way that you can determine the virgin status of your female flies.