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It seems logical that natural selection would work toward genetic uniformity; the genotypes that are most fit produce the most offspring , increasing the frequency of adaptive alleles and eliminating less adaptive alleles. Yet there remains a great deal of genetic variation within populations. Describe some of the factors that contribute to this variation
Describe the output of the oxygen monitor when the DO chamber is completely depleted of oxygen (with units).
A virus stock was diluted to 10^-8 and 0.1 ml assayed in triplicate. The plaque counts were 22, 18, and 20. Calculate the titer of the virus stock.
Describe what would be the specific probable effects on the cell if each of these organelles were lost. Try to avoid picking the same pair as other students in your class.
You trap and mark 400 field mice in one week. Later you come back and capture 200 field mice. Of the 200 captured in the second effort, 150 are recaptures.
Describe how the clonal expansion theory explains the more rapid production of antigen specific antibodies, Helper T-cells and Cytotoxic T-cells, during a secondary infection.
Elucidate where they came from with an easy diagram. The 10 with normal wings also have mutant green eyes and mutant hairy legs.
Primary reason for the incredible success of viruses in their incredible diversity. Explain why a virus that is well adapted to one species and causes no apparent disease can upon a switch to a new host range cause severe disease
Describe the regulation of eukaryotic gene expression. Include what regions of DNA and what proteins are important and why? Include a discussion of post-transcriptional regulation.
Why do you think that some of the cells in certain flasks looked healthier than other ones? What is present or absent in the growth media of the different flasks that can make a difference?
Since a doughnut contains a large quantity of energy that can become available for our metabolism when eaten, why isn't the doughnut "jumping" all over the counter or hot to the touch.
The measurements to be comparable in both preparations. Illustrate one experiment you could perform to demonstrate such lack of equivalence of the two cells in the zygote. Noticeably state the expected outcome of your experiment in the reply you prov..
You now grow Daphnia and Bosmina together. Suppose they remain limited by phytoplankton. What genetic basis of erminette pattern is suggested? How would you test your hypothesis.
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