possible phenotypes

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
Chapter14: Dna Structure And Replication
Section: Chapter Questions
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BICD100 HW6 Prokaryotic Genetics
Question 1. You are interested in three genes in bacteriophage. The recessive mutant alleles cause
plaque phenotypes that were creatively named fuzzy, shaky, and purple. Another lab published the
following map of the three genes:
fuzzy shaky
2.9
17.4
purple
To verify the published map, you cross a purple shaky phage strain with a fuzzy phage strain by co-
infecting E. coli at a high multiplicity of infection (every bacterium infected with both types of phage).
You plate the resulting lysate and analyze the phenotypes of the plaques caused by the progeny phage.
a. State the genotypes of the two parent phage strains:
b. List all eight of the possible phenotypes that could result from this cross. If 400 phage plaques were
examined from this cross, how many plaques of each of the eight phenotypic classes would you expect?
Transcribed Image Text:BICD100 HW6 Prokaryotic Genetics Question 1. You are interested in three genes in bacteriophage. The recessive mutant alleles cause plaque phenotypes that were creatively named fuzzy, shaky, and purple. Another lab published the following map of the three genes: fuzzy shaky 2.9 17.4 purple To verify the published map, you cross a purple shaky phage strain with a fuzzy phage strain by co- infecting E. coli at a high multiplicity of infection (every bacterium infected with both types of phage). You plate the resulting lysate and analyze the phenotypes of the plaques caused by the progeny phage. a. State the genotypes of the two parent phage strains: b. List all eight of the possible phenotypes that could result from this cross. If 400 phage plaques were examined from this cross, how many plaques of each of the eight phenotypic classes would you expect?
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