Microbiology: A Systems Approach
4th Edition
ISBN: 9780073402437
Author: Marjorie Kelly Cowan Professor
Publisher: McGraw-Hill Education
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Chapter 9.5, Problem 19AYP
Summary Introduction
To define:
The term mutation and also give one positive and negative example of it in microorganisms.
Introduction:
Mutation in an organism is defined as a sudden alteration of “
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Three of the many recessive mutations in Drosophila melanogaster that affect body color, wing shape, or bristle morphology are black (b) body versus grey in wild type, dumpy (dp), obliquely truncated wings versus long wings in the male, and hooked (hk) bristles versus not hooked in the wild type. From a cross of a dumpy female with a black and hooked male, all of the F1 were wild type for all three of the characters. The testcross of an F1 female with a dumpy, black, hooked male gave the following results:
Trait
Number of individuals
Wild type
169
Black
19
Black, hooked
301
Dumpy, hooked
21
Hooked, dumpy, black
172
Dumpy, black
6
Dumpy
305
Hooked
8
Determine the order of the genes and the mapping distance between genes.
Determine the coefficient of confidence for the portion of the chromosome involved in the cross. How much interference takes place in the cross?
What happens to a microbes membrane at colder temperature?
Genes at loci f, m, and w are linked, but their order is unknown. The F1 heterozygotes from a cross of FFMMWW x ffmmww are test crossed. The most frequent phenotypes in the test cross progeny will be FMW and fmw regardless of what the gene order turns out to be.
What classes of testcross progeny (phenotypes) would be least frequent if locus m is in the middle?
What classes would be least frequent if locus f is in the middle?
What classes would be least frequent if locus w is in the middle?
Chapter 9 Solutions
Microbiology: A Systems Approach
Ch. 9.1 - Define the terms genome and gene.Ch. 9.1 - Differentiate between genotype and phenotype.Ch. 9.1 - Diagram a segment of DNA, labeling all important...Ch. 9.1 - Summarize the steps of bacterial DNA replication...Ch. 9.1 - Compare and contrast the synthesis of leading and...Ch. 9.2 - Explain how the classical view of the central...Ch. 9.2 - Prob. 7AYPCh. 9.2 - Illustrate the steps of transcription, noting the...Ch. 9.2 - Prob. 9AYPCh. 9.2 - Prob. 10AYP
Ch. 9.2 - Identify the locations of the promoter, the start...Ch. 9.2 - Prob. 12AYPCh. 9.2 - Prob. 13AYPCh. 9.3 - Define the term operon and explain one advantage...Ch. 9.3 - Differentiate between repressive and inducible...Ch. 9.3 - Prob. 16AYPCh. 9.4 - Explain the defining characteristics of a...Ch. 9.4 - Describe three forms of horizontal gene transfer...Ch. 9.5 - Prob. 19AYPCh. 9.5 - Prob. 20AYPCh. 9 - Prob. 1CFCh. 9 - What is the smallest unit of heredity? a....Ch. 9 - The nitrogen bases in DNA are bonded to the a....Ch. 9 - DNA replication is semiconservative because the...Ch. 9 - In DNA, adenine is the complementary base for...Ch. 9 - Transfer RNA is the molecule that a. contributes...Ch. 9 - Prob. 6MCQCh. 9 - The lac operon is usually in the _____ position...Ch. 9 - Prob. 8MCQCh. 9 - Prob. 9MCQCh. 9 - When genes are turned on differently under...Ch. 9 - The DNA pairs are held together primarily by...Ch. 9 - Prob. 12TFCh. 9 - Prob. 13TFCh. 9 - Prob. 14TFCh. 9 - Prob. 15TFCh. 9 - Explain the relationship among the following...Ch. 9 - Prob. 2CTQCh. 9 - On paper, replicate the following segment of DNA:...Ch. 9 - Provide evidence in support of or refuting the...Ch. 9 - Prob. 5CTQCh. 9 - Prob. 6CTQCh. 9 - Prob. 7CTQCh. 9 - Prob. 8CTQCh. 9 - Prob. 9CTQCh. 9 - Use your knowledge of DNA recombination events to...Ch. 9 - Prob. 1CCCh. 9 - Prob. 2CCCh. 9 - Prob. 3CCCh. 9 - Prob. 1VCCh. 9 - From chapter 4, figure 4.11a. Speculate on why...Ch. 9 - Concept Mapping | Blooms Level 6: Create Appendix...
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