Data set A summarizes F2 numbers from an F1 cross arising from two, true-breeding Drosophila strains (P generation), which differ with respect to two mutant traits. The traits of legs shows an autosomal incomplete dominance pattern and the traits for wings shows an X-linked regular dominance pattern.
Data set A summarizes F2 numbers from an F1 cross arising from two, true-breeding Drosophila strains (P generation), which differ with respect to two mutant traits. The traits of legs shows an autosomal incomplete dominance pattern and the traits for wings shows an X-linked regular dominance pattern.
a) Produce a genetic hypothesis about the mode of inheritance of each of the alleles from your data set.
You must come up with a hypothesis that both makes sense and will not be rejected, in other words, you need a hypothesis that will corroborate the experimental observations.
b) Explain/describe how the data set seems to support your genetic hypothesis for each trait. For example, explain why you think a trait is recessive vs dominant or X-linked vs autosomal. To do this, you could comment on the observed ratios and/or differences or similarities in male and female numbers and explain how these provide support for your hypotheses.
c) Assign genetic symbols to the four alleles involved. Be sure your allele notations are informative. For example, use upper case to indicated dominance and lowercase to indicate recessive. If you use the superscript “+” it only tells the reader the allele is wildtype and not its dominance status. Be sure to review the posted video on LEARN to review how to assign meaningful alleles.
d) Illustrate how each of your genetic hypotheses is supported by the data. Show this using Punnett squares for each F1 cross and resulting F2 generation. Be sure all genotypes and
e) Indicate the expected (predicted) phenotypic numbers for the F2 generation from your Punnett square constructed in d) above.
Make sure the answer is fully typed, well organized, correct spelling, grammar, and notations used throughout. Instructions correctly followed.
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