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An experimenter is studying a gene that codes for a very small polypeptide phe-his-gly-cys-gly. He treated the cells with different mutagens with the following results to the protein:
For each treatment, describe the exact mutagenic event (e.g. transition, transversion, frameshift, etc.), the most likely codon sequence, and the type of mutagen used.
Explain the epidemiological attributes of this episode. In which special circumstances can cross-sectional surveys be utilized to test the hypotheses? In your answer explain briefly the characteristics of the cross-sectional study.
If a trait had a broad-sense heritability of 1, what would it mean? 0.5? 0? What type of traits has a broad-sense heritability of 1? What type of traits has a heritability of zero?
In 2010, under its WaterSense program, EPA began promoting showerheads that produce still-lower flows of two gallon every minute.
A batch animal cell culture has a productivity of 1.8 g/L*day, with a MUmax=0.5 days, a 10% inoculums and a turnaround time of 5 hours. If a continuous culture could operate at a dilution rate of 90% MUmax, explain what would be the productivity.
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.
Assume you have discovered that a single protein in two different cell lines is significantly overexpressed in one of them.
Think about the presence of hemoglobin in the catheter bag. What symptom would this loss of hemoglobin most strongly and immediately be linked to in the patient?
Draw the activation of the 5-HT Serotonin Receptor leading to transcriptional activation in a neuron.
Assume you have also identified a 3rd recessive mutation that you call crimson. Wasps homozygous for crimson have a red abdomen.
Why can there be dissimilarity between heart rate averaged over 15 seconds and instantaneous heart rates. Suppose that green turtle grass ingestion time for the sea urchins has an approximate normal distribution.
For a particular trait, an organism has the genotype Dd. Based on this information you can be certain that:
Think about a diploid organism with the genotype BbGgNnZZ. List all the different gamete types that this individual can produce.
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