Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Textbook Question
Chapter 42.4, Problem 1MI
Why are modular genes particularly suitable as platforms for the development of new natural products of industrial interest?
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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 42 Solutions
Prescott's Microbiology
Ch. 42.1 - Why are the cells first fed lactose and then...Ch. 42.1 - What critical limiting factors are used in the...Ch. 42.1 - Prob. 2CCCh. 42.1 - What kinds of molecular changes result from...Ch. 42.1 - Prob. 4CCCh. 42.2 - Why is there interest in developing alternatives...Ch. 42.2 - What types of microbes are good candidates for the...Ch. 42.3 - What is the objective of the scale-up process and...Ch. 42.3 - What parameters can be monitored in a modern,...Ch. 42.3 - Which of the following are secondary metabolites:...
Ch. 42.4 - Why are modular genes particularly suitable as...Ch. 42.4 - Prob. 2MICh. 42.4 - Prob. 1CCCh. 42.4 - Prob. 2CCCh. 42.4 - What is metabolic engineering? Besides...Ch. 42.4 - What is high-throughput screening and why has it...Ch. 42.4 - Prob. 5CCCh. 42.5 - Prob. 1MICh. 42.5 - What is the Ti plasmid and how is it modified for...Ch. 42.5 - How is Bt toxin produced and why is it so widely...Ch. 42.5 - Prob. 3CCCh. 42.6 - Why are diatoms and magnetotactic bacteria of...Ch. 42.6 - Prob. 2CCCh. 42 - Prob. 1RCCh. 42 - Prob. 2RCCh. 42 - Prob. 3RCCh. 42 - Prob. 4RCCh. 42 - Prob. 5RCCh. 42 - Prob. 6RCCh. 42 - Prob. 7RCCh. 42 - Prob. 1ALCh. 42 - Prob. 2AL
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