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Question: Suppose that several years ago you mapped two genes: A and B. You discovered that they were 12 map units apart. Since that time other analyzers have mapped several other genes in the area between genes A and B, and the current map of that chromosome shows genes A, B, […]

A plant species X with n=5 chromosomes was crossed with a related species Y with n = 7 chromosomes. The F1 hybrids produced only a few pollen grains, which were used to fertilize the ovules of related species Z with n=7 chromosomes. A few plants were produced from this cross, […]

Consider a culture into which two E. coli strains are inoculated. Strain A is normal with g=21 min at 37 degrees C, and 42 mins at 27 degrees C. Strain B has a temperature-sensitive mutation, such that g=55 mins at 37 degrees C, and 39 mins at 27 degrees C. […]

When using the Nernst equation to calculate membrane potential, we are making several assumptions about conditions in the cell. Which of the following is not a good assumption? a. The temperature is 37 degrees C.b. The plasma membrane is primarily permeable to Na+.At rest, the interior of the cell is […]