In a cotransformation experiment (see solved problem S4), DNA was isolated from a donor strain that was
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70 colonies grew on the medium containing proline, streptomycin, and tetracycline, but only 2 of these 70 colonies grew when restreaked on the medium containing strepto'mycin and tetracycline but lacking proline.
A. If we assume the average size of the DNA fragments is 2 minutes, how far apart are these two genes?
B. What would you expect the cotransformation frequency to be if the average size of the DNA fragments was 4 minutes and the two genes are 1.4 minutes apart?
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