Lab- Punnett Squares

PreLab Questions-

1. Define the terms haploid and diploid.

2. What information do we gain from doing a punnett square?

3. Define the term allele.

4. How many copies of each trait are contained in a single gamete?

Post Lab Questions-

5. If you mate two black flies what color(s) can their offspring be and why?

6. How can two flies with normal wings have offspring with vestigial wings?

7. Someone removed the labels from your fly jars. You have a jar of gray flies. Do you know their genotype? Why or why not?

8. You mate two gray normal winged flies and get offspring which are all gray but 25% of them have vestigial wings. What are the genotypes of the flies you mated?

9. Explain how many phenotypes are there for a trait that has two alleles that are governed by incomplete dominance.

10. Explain how many phenotypes are there for a trait that has two alleles that are governed by co- dominance.