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Sex And Phenotype Of The Mutant Fly

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Name: Samantha Pipher Section: 03

1. Describe the sex and phenotype of the mutant fly. Describe the phenotype as it compares to the wild type.
You can obtain this information by clicking on the fly and looking at the Properties window.

The sex of the grounded mutant fly is female and the phenotype as compared to the wildtype is wingless, but otherwise normal for other traits besides wings. This would be directly compared to the normal (winged) wildtype phenotype that is represented by an added (+).

2. You want to determine the genotype of grounded. You are unsure whether the mutant allele confers a phenotype that is dominant or recessive to wild type. You are also not sure if grounded is true-breeding or not. To determine its …show more content…

5. Now you have determined some facts about the grounded allele and the trait that it causes. Given what you know, do you expect the mutant F1 flies to be homozygous or heterozygous for the allele that causes the grounded trait? According to your reasoning, if you mated two mutant F1 flies, what percentage of flies would you expect to be wild type versus mutant in the F2 progeny? Draw a Punnett square of this cross to justify your answer.
It would be expected that the mutant F1 flies would be heterozygous for the allele responsible for the grounded trait. If two F1 flies were mated, the percentage of flies that would be expected to be wildtype in the F2 generation would be 25% mutants given that the mutant allele (ap) is predicted to be recessive and, leaving 75% to be wildtype (ap+).
An expected F2 cross would be as follows: (The expected ratio would be 3:1 in this case – wildtype : mutant).

ap+ ap ap+ ap+ ap+ ap ap+ ap ap+ ap ap ap

6. Now mate a mutant F1 female fly with a mutant F1 male fly. Out of the 50 F2 progeny, what percentage of flies are wild type and what percentage are mutant
You can collect individual flies that you have generated (for use in future experiments) by dragging them

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