Pearson eText for Laboratory Experiments in Microbiology -- Instant Access (Pearson+)
12th Edition
ISBN: 9780137546503
Author: Ted Johnson, Christine Case
Publisher: PEARSON+
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Chapter 40, Problem 2CT
Summary Introduction
To analyze:
The non-usefulness of Koch's postulates in determining the etiology of a viral disease.
Introduction:
A viral infection is defined as the transmission of a viral particle in the body of the host that results in the occurrence of disease. Viruses are the particles that have a DNA molecule enclosed in a protein coat. It only shows the property of life when present in a living organism.
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After you feel comfortable with your counting method and identifying cells in the various stages of mitosis, use the four images below of whitefish blastula to count the cells in each stage until you reach 100 total cells, recording your data below in Data Table 1. (You may not need to use all four images. Stop counting when you reach 100 total cells.)
After totaling the cells in each stage, calculate the percent of cells in each stage. (Divide total of stage by overall total of 100 and then multiply by 100 to obtain percentage.)
Data Table 1Stage Totals PercentInterphase Mitosis: Prophase Metaphase Anaphase Telophase Cytokinesis Totals 100 100%
To find the length of time whitefish blastula cells spend in each stage, multiply the percent (recorded as a decimal, in other words take the percent number and divide by 100) by 24 hours. (Example: If percent is 20%, then Time in Hours = .2 * 24 = 4.8) Record your data in Data…
Chapter 40 Solutions
Pearson eText for Laboratory Experiments in Microbiology -- Instant Access (Pearson+)
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