Part A: Questions from the Drosophila melanogaster practical

1. Present the results of the Drosophila melanogaster breeding experiment in a suitable format. Include class results for both F1 and F2 generations. Also include your own results for F1 and F2 generations.

Parental:
2 males and 2 females
wt (wildtype) x v (vestigial)

Own results for F1 generation.
F1 own results and Number of flies
Wildtype wings (long) 4 males (brown eyes)+ 4 females (brown eyes)
Vestigial wings (short) 0

Class results for F1 generation.
F1 class data and Number of flies
Wildtype wings (long) 897
Vestigial wings (short) 0

Own results for F2 generation.
F2 own results and Number of flies
Wildtype wings (long) 6 female (brown eyes) + 5 males (brown eyes) = 11
Vestigial wings (short) 3 female (brown eyes) + 4 males (brown eyes) = 7

Class results for F2 generation: will be provided soon.
F2 own results and Number of flies
Wildtype wings (long) 1050
Vestigial wings (short) 346

2. What is the mode of inheritance of vestigial wings in D. melanogaster?
Choose a letter to indicate the gene for wildtype / vestigial winged gene. Using this letter show state, the genotype of the:
a) wildtype and vestigial winged parental flies
b) F1 generation
c) F2 generation

3. Draw Punnett squares to show the ratios in the experiment for:
a) Parental to F1 generation
b) F1 to F2 generation

The Punnett squares should show both the genotype AND phenotype.

4. Carry out a suitable statistical test on the class results of F2. Write a null hypothesis and show all of the steps clearly. State whether you should accept or reject the null hypothesis. State your conclusion and how this relates to the genetic basis of vestigial wings. Include a brief discussion of the results.

Part A: Questions from the Drosophila melanogaster practical 1....