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Scenario:A 4-month-old infant had been running a moderate fever for 36 hours, and a nervous mother made a call to her pediatrician. Examination and testing revealed no outward signs of infection or cause of the fever. The anxious mother asked the pediatrician about antibiotics, but the pediatrician recommended watching the infant carefully for two days before making a decision. He explained that decades of rampant use of antibiotics in medicine and agriculture had caused a worldwide surge in bacteria that are now resistant to such drugs. He also said that the reproductive behavior of bacteria allows them to exchange antibiotic resistance traits with a wide range of other disease-causing bacteria, and that many strains are now resistant to multiple antibiotics. The physician's information raises several interesting questions.
Question:
A) Was the physician correct in saying that bacteria can share resistance?
B) If the infant was given an antibiotic as a precaution, how might it contribute to the production of resistant bacteria?
Explain how the silent substitution rate (single base substitutions at sequence locations that do not affect the amino acid sequence) can be used to estimate the base mutation rate (µ).
A made-up disease called YUCK only develops in individuals who are homozygous recessive for that gene. An individual with the YUCK disease has parents that do not have this disease
How would vestigial traits be explained if evolution occurred via inheritance of acquired characters as proposed by Lamarck?
Purines and pyrimidines play crucial part in cellular energy systems signaling and in the production of DNA and RNA.
Because you want to see if you can determine a more accurate analysis of the frequency of the disease allele in your population, your sample 2,000 individuals
How did Thomas Hunt Morgan"s experiments with eye colour in Drosophila show the existence of sexlinked genes.
Suppose that a molecular clock has been operating since the divergence of two species, calculate the divergence rate, given that the amino acid difference is 20 percent.
Describe how each functions, and outline how the organs work together to carry out the role of an organ system. What quantity of the purple flowered, short stem plants in the F2 are expected to be pure breeding. Illustrate the work.
Crick, Brenner, and colleagues conducted experiments in 1961 using mutants in the rII locus of the T4 phage. They were able to show that certain mutations could be reversed if they.
the scenario: Zoologists monitoring the wild Siberian tiger population have determined the current number of while-furred tigers to be 5% of the remaining 1,500 Siberian tigers.
List in chronological order five major discoveries or developments in molecular biology and bioinformatics since the early 1950's, which you consider responsible for the current state of these fields. Provide a brief explanation for each of your c..
Suppose you discovered that a mouse lacking copies of the conventional kinesin gene appeared to show no ill effects and lived to a ripe old age.What could you conclude about the role of kinesin in intracellular locomotion?
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