To map genes of a bacterial strain conjugation must be interrupted at given times. Suppose you have Show more To map genes of a bacterial strain conjugation must be interrupted at given times.
Suppose you have Hfr cells of genotype a + b + c + d + e + str S and F cells of genotype a b c d e str R and you combine these two cultures in liquid medium in four blenders at time 0. After intervals of 3 6 9 and 12 minutes you turn on successive blenders. The resulting cultures were then plated on medium containing streptomycin. Why? A) to eliminate non-conjugated F- cells B) to eliminate the Hfr cells C) to selectively eliminate cells that have taken in F+ genes D) to eliminate all non-conjugated cells Show less
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