B. In fruit fly, Drosophila, the genes for vestigial wings, white eyes, and black body ar linked. These genes are recessive. A fruit fly strain that is homozygous for white eyes wa crossed with a strain that is homozygous for vestigial wings and black body. The F1 wer then testcrossed, and the resulting offspring were as follows: Phenotype Number wild type (dominant for all traits) 9 white eyes 1779 vestigial wings 241 black body 131 vestigial wings, black body 1654 vestigial wings, white eyes 118 white eyes, black body 252 vestigial wings, white eyes, black body 13 1. Calculate the map distance between the genes for a. vestigial wings and white eyes b. vestigial wings and black body c. white eyes and black body 2. What is the correct order of gene in the chromosome?

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Chapter19: Introduction To Genetics
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B. In fruit fly, Drosophila, the genes for vestigial wings, white eyes, and black body are
linked. These genes are recessive. A fruit fly strain that is homozygous for white eyes was
crossed with a strain that is homozygous for vestigial wings and black body. The F1 were
then testcrossed, and the resulting offspring were as follows:
Phenotype
Number
wild type (dominant for all traits)
9
white eyes
1779
vestigial wings
241
black body
131
vestigial wings, black body
1654
vestigial wings, white eyes
118
white eyes, black body
252
vestigial wings, white eyes, black body 13
1. Calculate the map distance between the genes for
a. vestigial wings and white eyes
b. vestigial wings and black body
c. white eyes and black body
2. What is the correct order of gene in the chromosome?
Transcribed Image Text:B. In fruit fly, Drosophila, the genes for vestigial wings, white eyes, and black body are linked. These genes are recessive. A fruit fly strain that is homozygous for white eyes was crossed with a strain that is homozygous for vestigial wings and black body. The F1 were then testcrossed, and the resulting offspring were as follows: Phenotype Number wild type (dominant for all traits) 9 white eyes 1779 vestigial wings 241 black body 131 vestigial wings, black body 1654 vestigial wings, white eyes 118 white eyes, black body 252 vestigial wings, white eyes, black body 13 1. Calculate the map distance between the genes for a. vestigial wings and white eyes b. vestigial wings and black body c. white eyes and black body 2. What is the correct order of gene in the chromosome?
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