10. The genes Stubble (Sb), Lyra (Ly), and bright (br) are all linked on chromosome 3 in Drosophila fruit flies. An organism that was heterozygous for all three genes was mated to an organism that was homozygous recessive for all three. The following phenotypes were seen in the offspring: All wild-type 422 Lyra and Stubble 4 Stubble and bright 16 Lyra and bright 75 Lyra only 18 Stubble only 59 Bright only 2 Lyra, Stubble, and bright 404 f. What are the alleles in the parental gametes? g. What are the alleles in the double crossover gametes? h. What gene is in the middle of the three? i. Draw a genetic map of the Stubble, Lyra, and bright genes and label the map distance between them.
10. The genes Stubble (Sb), Lyra (Ly), and bright (br) are all linked on chromosome 3 in Drosophila fruit flies. An organism that was heterozygous for all three genes was mated to an organism that was homozygous recessive for all three. The following phenotypes were seen in the offspring: All wild-type 422 Lyra and Stubble 4 Stubble and bright 16 Lyra and bright 75 Lyra only 18 Stubble only 59 Bright only 2 Lyra, Stubble, and bright 404 f. What are the alleles in the parental gametes? g. What are the alleles in the double crossover gametes? h. What gene is in the middle of the three? i. Draw a genetic map of the Stubble, Lyra, and bright genes and label the map distance between them.
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter13: Genes, Chromosomes, And Human Genetics
Section: Chapter Questions
Problem 7TYK: In Drosophila, two genes, one for body color and one for eye color, are carried on the same...
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