Genetics: From Genes to Genomes, 5th edition
5th Edition
ISBN: 9780073525310
Author: Leland H. Hartwell, Michael L. Goldberg, Janice A. Fischer, Leroy Hood, Charles F. Aquadro
Publisher: McGraw-Hill Education
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Chapter 8, Problem 5P
Consider Crick and Brenner’s experiments in Fig. 8.4 (p. 259), which showed that the genetic code is based on
| a. | Crick and Brenner obtained FC7, an intragenic suppressor of FC0, that was a mutation in a second site in the rIIB gene near the FC0 mutation. Describe a different kind of mutation in the rIIB gene these researchers might have recovered by treating the FC0 mutant with proflavin and looking for restored rIIB+ function. |
| b. | How could Crick and Brenner tell the difference between the occurrence described in part (a) and an intragenic suppressor like FC7? |
| c. | When FC7 was separated from FC0 by recombination, the result was two rIIB- mutant phages: One was FC7 and the other was FC0. How could they discriminate between the rIIB- recombinants that were FC7 and those that were FC0? |
| d. | Explain how Crick and Brenner could obtain different deletion (−) or addition (+) mutations so as to make the various combinations such as ++, − −, +++, and − − − shown in Fig. 8.4c. |
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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.)
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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 8 Solutions
Genetics: From Genes to Genomes, 5th edition
Ch. 8 - For each of the terms in the left column, choose...Ch. 8 - Match the hypothesis from the left column to the...Ch. 8 - How would the artificial mRNA 5GUGUGUGU . . . 3 be...Ch. 8 - An example of a portion of the T4 rIIB gene in...Ch. 8 - Consider Crick and Brenners experiments in Fig....Ch. 8 - The HbSsickle-cell allele of the human -globin...Ch. 8 - The following diagram describes the mRNA sequence...Ch. 8 - The amino acid sequence of part of a protein has...Ch. 8 - The results shown in Fig. 8.5 on p. 260 may have...Ch. 8 - Identify all the amino acid-specifying codons in...
Ch. 8 - Before the technology existed to synthesize RNA...Ch. 8 - A particular protein has the amino acid sequence...Ch. 8 - Prob. 13PCh. 8 - How many possible open reading frames frames...Ch. 8 - a. In Fig. 8.3 on p. 257, the physical map the...Ch. 8 - Charles Yanofsky isolated many different trpA-...Ch. 8 - Remembering that the wobble base of the tRNA is...Ch. 8 - The sequence of a segment of mRNA, beginning with...Ch. 8 - You identify a proflavin-generated allele of a...Ch. 8 - In certain bacterial species, pyrrolysine Pyl,...Ch. 8 - Describe the steps in transcription that require...Ch. 8 - Chapters 6 and 7 explained that mistakes made by...Ch. 8 - The coding sequence for gene F is read from left...Ch. 8 - If you mixed the mRNA of a human gene with the...Ch. 8 - Describe the steps in translation that require...Ch. 8 - Locate as accurately as possible the listed items...Ch. 8 - Concerning the figure for Problem 26: a. Which...Ch. 8 - In prokaryotes, a search for genes in a DNA...Ch. 8 - The yeast gene encoding a protein found in the...Ch. 8 - The sequence of a complete eukaryotic gene...Ch. 8 - Using recombinant DNA techniques which will be...Ch. 8 - a. The genetic code table shown in Fig. 8.2 on p....Ch. 8 - Arrange the following list of eukaryotic gene...Ch. 8 - Concerning the list of eukaryotic gene elements in...Ch. 8 - The human gene for 2 lens crystallin has the...Ch. 8 - Do you think each of the following types of...Ch. 8 - Null mutations are valuable genetic resources...Ch. 8 - The following is a list of mutations that have...Ch. 8 - Considering further the mutations described in...Ch. 8 - When 1 million cells of a culture of haploid yeast...Ch. 8 - Why is a nonsense suppressor tRNATyr, even though...Ch. 8 - Prob. 42PCh. 8 - You are studying mutations in a bacterial gene...Ch. 8 - Another class of suppressor mutations, not...Ch. 8 - Yet another class of suppressor mutations not...Ch. 8 - There is at least one nonsense suppressing tRNA is...Ch. 8 - Prob. 47PCh. 8 - Brenners m mutant phages m1 m6 described in Fig....
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