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You have two true-breeding lines of fruit flies. One is gray (eb+), red eyed (w+), and dwarf (d). The other is ebony (eb), white eyed (w), and normal size (d+). You cross the lines to produce F1 offspring, which you then use in a test cross. The following offspring are […]

1. To understand how energy could be flowing in this aquatic ecosystem, list the different autotrophic and heterotrophic organisms found at each pond, and explain its role in energy flow through the system.2. How would the pH and dissolved oxygen change over the course of a day (morning, noon, and […]

You insert a 7 kb segment of mouse DNA into the SV40 chromosome (SV40 DNA = 7.5 kb), creating a recombinant viral chromosome. You then transfect a culture of chimpanzee kidney cells with this DNA. You proceed to isolate intact recombinant viral chromatin from the kidney cells. The chromatin is […]

LAB Book Used: Leboffe and Pierce (2016). Brief microbiology laboratory theory and application (3rd ed.) Englewood, CO: Morton Publishing. ISBN: 9781617314773 Exercise 2-13 (Chemical Germicides: Disinfectants and Antiseptics) 1. The concentrations of the potential germicides are very different. Why is ok to compare these agents at different concentrations? 2. Which […]