A Wt female Wt male medium leg female medium leg male long leg female long leg male truncated wings, medium leg male truncated wings male truncated wings, long leg male *long leg is wildtype 355 167 679 351 338 175 337 165 168
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 genes can be autosomal or X-linked and the mutant alleles can be dominant or recessive or incompletely or co-dominant. For Section 1 of part A do the following in the order given:
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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