The genes associated with color blindness and hemophilia are located on the X chromosome. If the recombination frequency between these genes is 25%, what is the genetic map distance between them? Explain how you arrived at your answer, and why calculating recombination frequencies are an important step in creating genetic maps
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A genetic map is made in two steps: (1) Finding linkage between two genes establishes that they are on the same chromosome, and (2) measuring how frequently crossing over takes place between them establishes the distance between them. The units of distance are expressed as a percentage of crossing over, where 1 map unit is equal to a 1% crossover frequency (one map unit is also known as a centimorgan, or cM). Therefore, a 25% recombination frequency is equal to 25 map units or cM.
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In general, when cytosine bases in CpG islands are methylated:
A. transcription is active and rapid. B. transcription is active, but slow. C. transcription is repressed. D. translation is active and rapid. E. translation is repressed.
Blood returning to the mammalian heart in a pulmonary vein will drain first into the
A. vena cava. B. left atrium. C. right atrium. D. left ventricle. E. right ventricle.
Assuming one mutational event in a gene, on average, which of the following mutagens or mutational conditions would be expected to cause the most damage to a protein synthesized by such a mutagenized gene: 5-bromouracil, 2-amino purine, ethylmethane
sulfonate, or frameshift?
If 90 molecules of CO2 are fixed by ribulose bisphosphate (RuBP), how many molecules of phosphoglyceraldehyde (PGAL) will leave the Calvin cycle?
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