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2810F10Q7v2ANS

2810F10Q7v2ANS - Your name Your TA's name BioGD2810...

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Unformatted text preview: ______________________________ __ _______________________________ Your name Your TA's name BioGD2810 Genetics Fall 2010 Quiz #7 You are studying the genetic organization of the hypothetical rIII region of bacteriophage T4. rIII mutants have exactly the same effects as mutants in the rII region. You have isolated 10 mutants in the rIII region, 7 of which are point mutations and 3 of which are deletions. [Hints: (1) deletions are mutations that cannot yield wildtype recombinants when crossed with either of two mutations that can yield wildtype recombinants when crossed with each other; and (2) the complementation table may also provide clues to identifying certain deletions by a different means.] The results of recombination and complementation testing of these 10 rIII mutations are shown below. These analyses show that there are 3 complementation groups in the rIII region. Recombination testing (- means none or very few; + means more than very few) 1 2 3 4 5 6 7 8 9 10 1- +----- +- + 2 +- + + + + + + + + 3- +-- + + + + + + 4- +--- + + + + + 5- + +-- + + + + + 6- + + + +- + + + + 7- + + + + +--- + 8 + + + + + +-- + + 9- + + + + +- +- + 10 + + + + + + + + +- Complementation testing 1 2 3 4 5 6 7 8 9 10 1---------- 2---- + + + + + + 3---- + + + + + + 4------ + + + + 5- + +--- +...
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2810F10Q7v2ANS - Your name Your TA's name BioGD2810...

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