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Q. Assume that pesticide resistance in beetles is a quantitative trait that can be measured as the number of days a beetle survives after exposure to the pesticide. The least resistant beetles die within one day, while the most resistant beetles can live for 12 days after exposure.
a) Illustrate an experiment that you could use to measure how this population of beetles responds to the selection that occurs when the population is exposed to the pesticide. Include details about how you would control non-genetic sources of variation.
b) Sketch a graph showing the response to selection if the heritability, h2, of pesticide resistance is 0.2.
c) Sketch another graph showing the response to selection if the heritability, h2, of pesticide resistance is 0.8.
Suppose you are a geneticist and you're asked to examine the effects of a radiation leak that occurred at a facility in Iraq several years ago. How will you assess the level of mutations caused by this leak.
A patient has esophageal cancer and should have a feeding tube inserted. The nurse tells the patient that the tube will be inserted surgically into the duodenum. The wife asks why the tube will not be inserted into the stomach directly.
What advantage will heterozygotes have over the homozygotes. Why selection inevitably favors any gene that is good at getting into the next generation, regardless of whether that gene helps or hurts the ecosystem, the species, the group, or even the ..
The membrane vesicles are next washed, the membranes solubilized and the proteins denatured and analyzed by SDS gel electrophoresis and Western blotting using polyclonal antibodies against glycophorin A, an erythrocyte plasma membrane protein.
What genetic basis of erminette pattern is suggested? How will you test your hypothesis. In brief compare the progress of an infectious disease through a well-immunized population with its progress during a poorly immunized population.
What is the possibility that they will have a daughter that has the disease. Vitamin-D resistant rickets is a sex-linked dominant trait.
What kind of approach is this alien taking to learn about the car? An alien from a new planet landed on earth. He is attentive by cars and is determined to figure out how they work.
If the mutation is in mitochrondrial DNA, will the four haploid cells probably be all Pyr-, all Pyr+, or a combination? What if the mutation is in nuclear DNA. Why is mitochondrial function critical for growing on pyruvate.
In maize, a dominant allele (A) is essential for seed color as opposed to colorless (a). Another gene has a recessive allele (w) which results in waxy starch, as opposed to normal starch (W).
Write a case study which detailing a scenario of a patient being investigated in the Haematology laboratory.
Explain this dosage strategy in terms of the negative feedback control of cortisol secretion and receptor function in hormonal pathways.
Describe why it may matter if the county had dry areas, swampy areas, forests, and meadows all within its boundaries. As a doctor, which of the statements are important factors for you to consider as you decide whether or not to remove the patient's ..
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