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A cross is made between 2 E. coli strains: Hfr arg+ bio+ leu+ (x) F- arg- bio- leu-. Interuppted mating studies show that arg+ enteres the recipient last, so arg+ recombinants are selected on a medium containing bio and leu only. The recombinants are tested for the presence of bio+ and leu+. The followning numbers of individuals are found for each genotype:
arg+ bio+ leu+ 320arg+ bio+ leu- 8arg+ bio- leu+ 0arg+ bio- leu- 48
What is the gene order? What are the map distances in recombination units.
Construct a hypothesis to explain the observation? From what you know about plants, if we were to place one of the test tube and beaker combinations in front of a green light, what would happen?
Detail the hormones responsible for maintaining fluid and electrolyte balance. Critically discuss the three primary buffering systems.
He hopes this will slow the evolutionary development of BT resistant insects. Which seed variety must he use the 10 percent of his field that is not planted with BT 123 seeds.
Two true breeding pea plants were crossed. One parent is round, terminal, violet, constricted, while other expresses the respective contrasting phenotypes of wrinkled, axial, full.
Roger Crocket, a sixty-eight year-old man with a 40-pack-year smoking history and recent complaints of angina upon exercising, collapsed while mowing his lawn.
Think about a population in which the frequency of allele A is p = 0.7 and the frequency of allele a is q = 0.3, and in which the alleles are codominant.
Determine channel length (in cm) needed for mixing by diffusion two solutions flowing at a speed of 1 cm/s, one of which is water and the other is a salt solution.
Distinguish between the terms configuration, margin, and elevation. Describe the best way to view each of these characterisitcs?
What is meant by the expression "typical spinal nerve unit"? With the aid of a simple diagram, describe and explain the components of such a unit.
The urine of a thirteen year old boy turned dark brown several weeks after a bout with strep throat. The diagnosis was glomerulonephritis.
In peas, the genes a, b, c, d, e and f are linked on chromosome V and in the order given and the map distances are RF(a-b)=7 cM, RF(b-c) = 17 cM, RF(c-d) = 12 cM, RF (d-e) = 14 cM RF(e-f)= 10 cM.
Aquatic leaf at 10 percent salt solution under the microscope. The next question ask me to reverse the procedure by adding 1-2 drops of DI water.
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