Question: Tina put a culture of Escherichia cells in a medium containing glucose and nitrate (NO3-) on a shaker and turned on the shaker for aeration. The next day she had a nice dense culture of cells. When she repeated this procedure, she forgot to put the culture on the shaker. […]

Question: What is a gene family? what mechanisms generate them? Question: What is a SNP? What is a haplotype? How can SNP haplotypes be determined? You repeat Snyder’s experiment, but instead of determining the ability of each family member to taste PTC, you determine what alleles they carry: 2 PAV (PAV/PAV), […]

Population Density Lab NOTE: You will need a TI-83 or 84 graphing calculator for this lab. If you don’t own one, try to borrow one. If you cannot borrow one, there are free TI-83 calculator downloads online here: http://education.ti.com/en/us/software/details/en/480DF008128C49DDA5E882E76CE9C8B2/swti83plussdk Although density is usually an important population characteristic in ecological studies, […]

Exercise 1: Hanging-drop and wet-mount preparations 1. How does true motility differ from Brownian movement?2. What morphological structure is responsible for bacterial motility?3. Why is a wet preparation discarded in disinfectant solution or biohazard container?4. What is the value of a hanging-drop preparation?5. What is the value of a wet-mount […]