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Part 2: Monohybrid Crosses You may realize that choosing a lot of different types of flies make it difficult to analyze inheritance patterns. Your next tasks will focus on analyzing single traits within flies to determine how they are inherited. 1. Reset all flies in the design tab 2. Design a male fly with vestigial wings and cross it with a wild-type female 3. Add the results to your "Lab Notes." 4. Mate the offspring of this cross. 5. Based on these two crosses you probably have an idea about how vestigial wings are inherited, is VG recessive or dominant? How do you know? 6. If your hypothesis that VG is a recessive trait is correct, then you would expect what proportion of the F2 offspring to have vestigial wings and what proportion to have wild-type wings? 7. Under the Analyze tab, you can click on "Include a test hypothesis." Use the chi square calculator by inputting your expected results Summarize the results and whether your data support your hypothesis. Vestigial wings are recessive because the male in the first cross had vestigial wings, and the female was a wild type. The cross produced offspring with normal wings in both sexes. The Proportion of the F2 offspring to have vestigial wings is 1/4, and the proportion to have wild type wings is 3/4. Design another monohybrid cross using any of the wing shape phenotypes 8. Describe your experimental set-up, which includes the phenotypes of the parents and the expected proportions in the offspring. You will need to propose which trait is dominant, either the wild-type or the mutant. (Note, many of the fruit fly traits are controlled by multiple factors, so you may not get the expected results.) 9. Complete the table showing your observed and expected results. Obs Exp 10. Use the chi square calculator to analyze your results. Provide a summary that includes whether you

Part 2: Monohybrid Crosses
You may realize that choosing a lot of different types of flies make it difficult to
analyze inheritance patterns. Your next tasks will focus on analyzing single
traits within flies to determine how they are inherited.
1. Reset all flies in the design tab
2. Design a male fly with vestigial wings and cross it with a wild-type female
3. Add the results to your "Lab Notes."
4. Mate the offspring of this cross.
5. Based on these two crosses you probably have an
idea about how vestigial wings are inherited, is VG
recessive or dominant? How do you know?
6. If your hypothesis that VG is a recessive trait is
correct, then you would expect what proportion of the
F2 offspring to have vestigial wings and what proportion
to have wild-type wings?
7. Under the Analyze tab, you can click on "Include a
test hypothesis." Use the chi square calculator by
inputting your expected results
Summarize the results and whether your data support
your hypothesis.
Vestigial wings are recessive because the male in
the first cross had vestigial wings, and the female was a wild type. The cross produced offspring with
normal wings in both sexes.
The Proportion of the F2 offspring to have vestigial
wings is 1/4, and the proportion to have wild type
wings is 3/4.
Design another monohybrid cross using any of the wing shape phenotypes
8. Describe your experimental set-up, which includes
the phenotypes of the parents and the expected
proportions in the offspring. You will need to propose
which trait is dominant, either the wild-type or the
mutant. (Note, many of the fruit fly traits are controlled
by multiple factors, so you may not get the expected
results.)
9. Complete the table showing your observed and
expected results.
Obs
Exp
10. Use the chi square calculator to analyze your
results. Provide a summary that includes whether you

Added by Albert T.

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