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In interrupted mating experiments using an Hfr strain in E. coli, you find that two genes, bio and arg, are transferred at about the same time. A third gene, pab is transferred slightly later. In order to determine the gene order, you mate an Hfr strain that is pab+ bio+ arg+ with an F- strain that is pab- bio- arg-, select 3000 recombinant pab+ clones from the recipient strain, and test them for the presence of arg+ and bio+. You obtain the following results:pab+ bio+ arg+: 2607 clones pab+ bio- arg+: 61 clonespab+ bio+ arg-: 2 clones pab+ bio- arg-: 330 clonesPart AWhat is the order of the three genes?
A student encounters an animal embryo at the eight-cell stage. The 4-smaller cells that comprise one hemisphere of the embryo seem to be rotated forty-five degrees and to lie in the grooves between larger, underlying cells.
The bacteriophage genome consists primarily of genes encoding proteins that make up the head, collar and tail, and tail fibers. When these genes are transcribed given phage infection,
Diffusion is defined as the movement of solute molecules from a region of high concentration to low concentration. To learn about some of the factors that affect the rate of diffusion,How would increasing temperature affect diffusion rate
Suppose you decide to discover a way to prevent the mosquito dependent spread of the West Nile virus. You add a chemical to a small pool of water which contains many mosquito larvae.
Describe why an anaerobic indicator strip in an anaerobic environment will revert to blue if it gets wet.
Blindness is an autosomal dominant disorder in puppies. B or b are used to represent the gene that causes blindness. Black Hair Follicular Dysplasia is an autosomal recessive disorder in puppies.
Sort the statements into appropriate bins depending on which type of learning they explain. What is her anatomical dead space volume.
Ligation of the multiple fragments and pBLU produces a number of different hybrid molecules, although not as many as you might expect.
Darwin understood how natural selection works in the presence of a population with many variant types. What does that variation consist of? How does variation arise? How does it spread during the population.
A marine biologist has dredge up some unknown animal from the seafloor. Describe some of the characteristics she must look at to determine the animal phylum.
A 2500 base-pair long cDNA of unknown sequence was cloned into the MCS of a plasmid vector that has universal priming sequences adjacent to and on both sides of the MCS.
A scientist has discovered a new cell. illustrate, in detail, ALL the ways the scientist could decide if the cell comes from a plant or an animal. How several of these result in the release of oxygen into the atmosphere?
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