Free Response: Fruit Flies Genetics To do well on the question, you will need to use the proper terminology and cover each point in the question in-depth. Be sure to define important terms and provide real world examples of how the concept relates to living organisms. In fruit flies, the phenotype for eye color is determined by a certain locus. E indicates the dominant allele and e indicates the recessive allele. The cross between a male wild type fruit fly and a female white eyed fruit fly produced the following offspring. Wild-type Male Wild-type White-eyed White-eyed Brown-eyed Female Male Female Female F1 45 55 1 The wild type and white eyed individuals from the F1 generation were then crossed to

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Free Response: Fruit Flies Genetics
To do well on the question, you will need to use the proper terminology and cover each point
in the question in-depth. Be sure to define important terms and provide real world examples
of how the concept relates to living organisms.
In fruit flies, the phenotype for eye color is determined by a certain locus. E indicates the
dominant allele and e indicates the recessive allele. The cross between a male wild type
fruit fly and a female white eyed fruit fly produced the following offspring.
Wild-type
Wild-type
White-eyed
White-eyed
Brown-eyed
Male
Female
Male
Female
Female
F1
45
55
1
The wild type and white eyed individuals from the F1 generation were then crossed to
produce the following offspring.
Wild-type
Wild-type
White-eyed
White-eyed
Brown-eyed
Male
Female
Male
Female
Female
F2
23
31
22
24
1. Determine the genotypes of the original parents (P generation) and explain your
reasoning. You may use Punnett squares to enhance your description, but the
results from the Punnett squares must be discussed in your answer.
2. Use a Chi-squared test on the F2 generation data to analyze your prediction of the
parental genotypes. Show all your work and explain the importance of your final
answer.
3. The brown eyed female in the F1 generation resulted from a mutational change.
Explain what a mutation is and discuss two types of mutations that might have
produced the brown eyed female in the F1 generation.
Transcribed Image Text:Free Response: Fruit Flies Genetics To do well on the question, you will need to use the proper terminology and cover each point in the question in-depth. Be sure to define important terms and provide real world examples of how the concept relates to living organisms. In fruit flies, the phenotype for eye color is determined by a certain locus. E indicates the dominant allele and e indicates the recessive allele. The cross between a male wild type fruit fly and a female white eyed fruit fly produced the following offspring. Wild-type Wild-type White-eyed White-eyed Brown-eyed Male Female Male Female Female F1 45 55 1 The wild type and white eyed individuals from the F1 generation were then crossed to produce the following offspring. Wild-type Wild-type White-eyed White-eyed Brown-eyed Male Female Male Female Female F2 23 31 22 24 1. Determine the genotypes of the original parents (P generation) and explain your reasoning. You may use Punnett squares to enhance your description, but the results from the Punnett squares must be discussed in your answer. 2. Use a Chi-squared test on the F2 generation data to analyze your prediction of the parental genotypes. Show all your work and explain the importance of your final answer. 3. The brown eyed female in the F1 generation resulted from a mutational change. Explain what a mutation is and discuss two types of mutations that might have produced the brown eyed female in the F1 generation.
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