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    Drawing a linear map representing the order

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    Five single rII deletion mutants of phage T4 were spot-tested in all pairwise combinations to test for their ability to give r+ recombinants. The results are given in Table (a). Five different point mutations were then tested in the same way for their ability to recombine with the five deletions. These results are given in Table (b). In both tables, "0" indicates no recombination, while "+" indicates that recombinants were detected. Using the information given, draw a linear map representing the order and overlap of the deletions and the positions of the point mutations.

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    The situation here is that two types of phages are introduced in massive quantities to a bacterium. Each type has a specific mutation, preventing the expression of some gene. Inside the bacterium, the phages will ...

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    The expert examines drawing a linear map representing the order.