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In mice, black coat color (B) is dominant over brown (b), and a solid pattern (S) is dominant over white spotted (s). Color and spotting are controlled by genes that assort independently. A homozygous black, spotted mouse is crossed with a homozygous brown, solid mouse. All the F1 generation are black and solid. A testcross is then carried out on the F1 mice.
Give the genotypes of the parents and the F1 mice, then give the genotypes and phenotypes, along with their expected ratios, of the progeny expected from the testcross.
It is commonly reported that up to 50 percent of a cell’s energy budget is spent on protein synthesis. How do you suppose such a measurement might be made?
Discuss the roles of mitosis and meiosis in animal and plant growth. How do these two processes differ from one another?
Think about the pathology of a cytokine storm, select possible strategies that would be likely to diminish the harmful effects of superantigen toxins.
What are the various tradeoffs associated with chucking in male tungara frogs?
For each of the E. coli strains given below, estimate the effect of the genotype on expression of the trpE and trpC genes in the presence and absence of tryptophan.
As you have learned in the readings, extinction is a natural selection process. You have also read that humans are often responsible for accelerating this procedure.
Why are bacteria, rather than say human cells, used as experimental organisms in molecular biology studies?
Outline an experiment to establish whether mature B-cells that are the immediate progenitors of memory cells transit a "second window" of tolerance susceptibility while undergoing somatic mutation during initial antigen challenge.
Describe the direction of blood flow and the type of blood oxygenated or deoxygenated for each vessel in the pulmonary and systemic circuits.
Compare and contrast a somatic cell with a reproductive cell in terms of cell replication, including processes undergone, resultant descendant cells, and chromosome numbers. Give examples of each.
Terry catches a ray-finned fish from the ocean and notices that, attached to its flank, there is an equally long, snakelike organism. The attached organism has no external segmentation, no scales, a round mouth surrounded by a sucker and two small ey..
Assume you are interested in performing a mutagenesis study and you design oligonucleotide primers and perform a polymerase chain reaction to induce a mutation of interest into a synthetically generated PCR DNA product.
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