Molecular Genetics of Prokaryotes Problem Set

Problem 6: Different alleles for a bacterial genes

How many lac Z genes were present in the cells described in problem 5 that were able to grow on minimal media?

A. Only 1, the lac Z allele on the bacterial chromosome.
B. Only 1, the lac Z allele on the bacterial chromosome.
C. Two, the lac Z allele on the bacterial chromosome and the
lac Z
allele on the bacterial chromosome.
D. Two, the lac Z allele on the bacterial chromosome and the
lac Z
allele on the F' episome.
E. coli cells with an F' episome may have more than one allele of a particular gene. In this case the lac Z allele of the F' episome is dominant to the lac Z allele of the bacterial chromosome. When cells are partially diploid for one or a few genes, dominance among the various alleles can be experimentally studied.
E. Only 1, the lac Z allele on the F' episome.


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