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dingo110791
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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.
E= dominant allele
e= recessive allele
The cross between a male wild-type and a female white-eyed fruit fly produced the following offspring:
F1 generation
wild-type male: 0
wild-type female: 45
white-eyed male: 55
white-eyed female: 0
brown-eyed female: 1
The wild-type and the white-eyed individuals from F1 were then crossed to produce the following offspring.
F2 generation
wild-type male: 23
wild-type female: 31
white-eyed male:22
white-eyed female: 24
brown-eyed female:0
a. Determine the phenotype of the P generation and explain your reasoning. You may use Punnett squares to enhance your description, but the results of the Punnett square must be discussed in your answer.
b. Use a Chi-squared test on the F2 generation data to analyze your prediction of the parental genotypes. Show all of your work and explain the importance of your final answer.
c. 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.
E= dominant allele
e= recessive allele
The cross between a male wild-type and a female white-eyed fruit fly produced the following offspring:
F1 generation
wild-type male: 0
wild-type female: 45
white-eyed male: 55
white-eyed female: 0
brown-eyed female: 1
The wild-type and the white-eyed individuals from F1 were then crossed to produce the following offspring.
F2 generation
wild-type male: 23
wild-type female: 31
white-eyed male:22
white-eyed female: 24
brown-eyed female:0
a. Determine the phenotype of the P generation and explain your reasoning. You may use Punnett squares to enhance your description, but the results of the Punnett square must be discussed in your answer.
b. Use a Chi-squared test on the F2 generation data to analyze your prediction of the parental genotypes. Show all of your work and explain the importance of your final answer.
c. 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.