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Biology 2e

Visual Connection Questions

Biology 2eVisual Connection Questions
1.

Figure 17.7 You are working in a molecular biology lab and, unbeknownst to you, your lab partner left the foreign genomic DNA that you are planning to clone on the lab bench overnight instead of storing it in the freezer. As a result, it was degraded by nucleases, but still used in the experiment. The plasmid, on the other hand, is fine. What results would you expect from your molecular cloning experiment?

  1. There will be no colonies on the bacterial plate.
  2. There will be blue colonies only.
  3. There will be blue and white colonies.
  4. The will be white colonies only.
2.

Figure 17.8 Do you think Dolly was a Finn-Dorset or a Scottish Blackface sheep?

3.

Figure 17.15 In 2011, the United States Preventative Services Task Force recommended against using the PSA test to screen healthy people for prostate cancer. Their recommendation is based on evidence that screening does not reduce the risk of death from prostate cancer. Prostate cancer often develops very slowly and does not cause problems, while the cancer treatment can have severe side effects. The PCA3 test is more accurate, but screening may still result in people who would not have been harmed by the cancer itself suffering side effects from treatment. What do you think? Should healthy people be screened for prostate cancer using the PCA3 or PSA test? Should people in general be screened to find out if they have a genetic risk for cancer or other diseases?

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