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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 clonesWhat is the order of the three genes?a bio-- arg - pabb) arb-- bio -- pabc) arg -- pab -- bio
How can altering ice nucleation protein production yield a bacterial strain useful to agriculture? Explain the logic and how this works.
Discuss why is the skin on worms, the gills in fish, and the lungs in humans good epithelial surfaces for respiration. Be specific.
Assume if a man of blood group AB marries a woman of blood group A whose father was of blood group O, to what different blood groups can this man and woman expect their children to belong?
The offspring of a cross between the purple flowered plant and the white flowered plant are 23 plants with purple flowers and 26 plants with white flowers. What are the genotypes of the parent plants, and witch allele is dominant? Apply the letters W..
Explain the structures the dye passed through in order to get there and discuss and define the term transpiration-pull.
Explain the development of Anabaena heterocysts. Include the names of important structures and compounds.
How does the increase in estrogen level correspond to the thickness of uterine lining (endometrium)? Clarify why this makes sense based on the function of estrogen.
Which of the following illustrates hydrolysis.
Why use starved starved yeast rather than sugar fed yeasts for fermentation.What is the aim of ferementation after glycolysis.
You want 1 L of 100 mu M NaCl, and you have 1 M stock solution. How much of the stock solution and determine how much dH2O will you measure out for this dilution?
The number of individuals counted for nine species of birds on transects in logged (where trees were cut down) versus unlogged areas of tropical rainforest.
Describe the etiology and genetics of the disease phenylketonuria (PKU). Phenylketonuria (PKU) refers to a disease found in the humans in which the affected individual does not have enzyme phenylalanine hydroxylase.
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