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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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Ursa Ursa
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2 years ago
my homework question is stated as follows:

A lab technician has four strains of bacteria. Although he forgot to label them, he knows that they include one F+ strain, one Hfr strain, one F' strain, and one F- strain. He observed the following results after plating these strains on different media. Which of the following plates can be used to identify the F- strain?

I attached a screenshot of the figure provided and the correct answer, I just need some help understanding it.

To me it seems like adding histidine, glutamate, cysteine, and streptomycin would result in you finding out that the sample is F+.
I thought the answer would be to add leucine and streptomycin to the minimal growth medium, and when that was wrong I thought it would be histidine, glutamate, and cysteine.

Source  Genetic Analysis: an Integrated Approach 3e
Mark F. Sanders
John L. Bowman
Chapter 6
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Answer rejected by topic starter
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Educator
2 years ago
Found the answer here: https://biology-forums.com/index.php?topic=2000760.0

Any further questions, let me know!
Answer accepted by topic starter
emlaaiemlaai
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#2
Posts: 443
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2 years ago
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