1. Investigating Inheritance
You will use a simulation to investigate how a set of features in the fruit fly (Drosophila melanogaster) are inherited.
You will use information to produce a hypothesis for each feature, predict the outcome and then carry out breeding experiments to test your ideas.
Finally, you will use a statistical test to evaluate your conclusion.

2. Step One
Select the feature or set of features that you will investigate.

3. Step Two
Use the information section to find out about the feature and produce a hypothesis suggesting the type of inheritance that controls the feature.
Step Three
Predict the outcome you would expect if you are correct using a genetic diagram to explain it.
You should predict the outcome of an F1 and an F2 generation.

5. Step Four
Select your first set of parents so that you can produce a set of offspring to test your hypothesis.
Choose the parental phenotype and genotype that will best demonstrate if your hypothesis is correct.

6. Step Five
View the parents to check that they have the features you wanted and check their genotype.

7. Step Six
Produce the first generation of offspring.
Score the number of each phenotype and compare them against your prediction.
Make sure that you have a large enough sample size to be able to make a reliable conclusion.

8. Step Seven
If necessary, use the chi-squared statistical test to compare the outcome with your expected result.

9. Step Eight
Confirm your hypothesis by carrying out an F2 generation using offspring from the first generation as new parents.

10. Step Nine
Use the view screen to confirm that the new parents have the genotype you would expect from your prediction.

11. Step Ten
Carry out the second cross.
Score the offspring, making sure that your sample size is large enough.

12. Step Eleven
Use the Chi-squared test to compare the outcome of the second generation with your predicted outcome.
Step Twelve
Make your final conclusion.