4. In Drosophila, three autosomal, recessive mutations are ebony body (e), sepia eye color (s), and hairless bristles (h). A female fly heterozygous at all loci was testcrossed with an ebony, sepia, hairless male; the progeny are shown below. Using the gene symbols stated åbove, answer the following questions. Phenotype Observed # of offspring Ebony sepia, hairless ebony, sepia Hairless ebony, hairless Sepia wild type ebony, sepia, hairless | Total offspring 57 53 344 346 11 6. 89 91 1000 A. Give the genotypes of the flies in the testcross. Write the answer using the gene symbols stated above and using proper notation.

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4. In Drosophila, three autosomal, recessive mutations are ebony body (e), sepia eye color (s),
and hairless bristles (h). A female fly heterozygous at all loci was testcrossed with an ebony,
sepia, hairless male; the progeny are shown below. Using the gene symbols stated åbove,
answer the following questions.
Phenotype
Observed # of offspring
Ebony
sepia, hairless
ebony, sepia
57
53
344
346 ral
Hairless
ebony, hairless
Sepia
wild type
ebony, sepia, hairless
Total offspring
11
9.
89
91
1000
A. Give the genotypes of the flies in the testcross. Write the answer using the gene symbols
stated above and using proper notation.
B. Deduce the linkage map showing all distances among the three genes.
C. Calculate the interference. Show all work.
Transcribed Image Text:4. In Drosophila, three autosomal, recessive mutations are ebony body (e), sepia eye color (s), and hairless bristles (h). A female fly heterozygous at all loci was testcrossed with an ebony, sepia, hairless male; the progeny are shown below. Using the gene symbols stated åbove, answer the following questions. Phenotype Observed # of offspring Ebony sepia, hairless ebony, sepia 57 53 344 346 ral Hairless ebony, hairless Sepia wild type ebony, sepia, hairless Total offspring 11 9. 89 91 1000 A. Give the genotypes of the flies in the testcross. Write the answer using the gene symbols stated above and using proper notation. B. Deduce the linkage map showing all distances among the three genes. C. Calculate the interference. Show all work.
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