You have isolated two temperature-sensitive mutations in phage l that you suspect may be in the same gene. These phage mutants are called ts-1 and ts-2. Each mutant will form plaques at 35˚C but not at 42˚C. You cross ts-1 to ts-2 phage by coinfecting E. coli at the permissive temperature of 35˚C. When the resulting phage lysate is plated at 35˚C you count 10,000 plaques per ml of phage lysate, but when the same phage lysate is plated at 42˚C, there are only 80 plaques per ml.           What is the distance between the ts-1 and ts-2 mutations in m.u.?

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#Question id: 19278

#Unit 9. Diversity of Life Forms

which of these statements is true of the pine life cycle? 

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#Question id: 4275

#Unit 3. Fundamental Processes

CCA-adding enzymes add a specific sequence without a template because

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#Question id: 28522

#Unit 5. Developmental Biology

The apical cell undergoes a series of divisions to generate a spherical, eight-cell (octant) globular embryo exhibiting radial symmetry, is called as____

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#Question id: 28190

#Unit 5. Developmental Biology

The process by which portions of the genome are selected for expression in different embryonic cells, is called___

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#Question id: 10579

#Unit 10. Ecological Principles

The following graph is growing population, which of the following represent growth pattern?