Concepts of Genetics (11th Edition)
Concepts of Genetics (11th Edition)
11th Edition
ISBN: 9780321948915
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino
Publisher: PEARSON
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Chapter 25, Problem 3PDQ

Price et al. [(1999). J. Bacteriol 181:2358-2362) conducted a genetic study of the toxin transport protein (PA) of Bacillus anthracis, the bacterium that causes anthrax in humans. Within the 2294-nucleotide gene in 26 strains they identified five point mutations—two missense and three synonyms—among different isolates. Necropsy samples from an anthrax outbreak in 1979 revealed a novel missense mutation and five unique nucleotide changes among ten victims. The authors concluded that these data indicate little or no horizontal transfer between different B. anthracis strains.

  1. (a) Which types of nucleotide changes (missense or synonyms) cause amino acid changes?
  2. (b) What is meant by “horizontal transfer”?
  3. (c) On what basis did the authors conclude that evidence of horizontal transfer is absent from their data?
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↑ LED Tt O Tt e 0 ✓ B > FLORES DIology Second Semester Review 7. Chi Square Analysis: wild dumpy male x ebony wild female F1: All wild wild F2: 142 wild wild males 52 wild ebony males 46 dumpy wild males 17 dumpy ebony males 151 wild wild females 47 wild ebony females 51 dumpy wild females 8 dumpy ebony females What pattern of inheritance is observed for body color? Autosomal recessive Autosomal dominant Sex-linked recessive Sex-linked dominant What are the genotypes of the parents in the P generation? a. XBYdd x XbXbDD b. Bbdd x bbDd c. BBdd x bbDD d. BBX Y x bbXDY How many flies in the F2 generation would you expect to express the dumpy wild phenotype? a. 289.125 b. 97 c. 96.375 d. 293
4. This question focuses on entrainment. a. What is entrainment? b. What environmental cues are involved in entrainment, and which one is most influential? c. Why is entrainment necessary? d. Assuming that a flash of darkness is an effective zeitgeber, what impact on circadian rhythms would you expect to result from an event such as the 2024 solar eclipse (assume it was viewed from Carbondale IL, where totality occurred at about 2 pm)? Explain your reasoning. You may wish to consult this phase response diagram. Phase Shift (Hours) Delay Zone Advance Zone Dawn Mid-day Dusk Night Dawn Time of Light Stimulus e. Finally, give a real-world example of how knowledge of circadian rhythms and entrainment has implications for human health and wellbeing or conservation biology. This example could be from your reading or from things discussed in class.
Generate one question that requires a Punnet Squre to solve the question. Then show how you calculate the possibilities of genotype and phenotype

Chapter 25 Solutions

Concepts of Genetics (11th Edition)

Ch. 25 - The genetic difference between two Drosophila...Ch. 25 - The use of nucleotide sequence data to measure...Ch. 25 - The ability to taste the compound PTC is...Ch. 25 - Prob. 7PDQCh. 25 - What must be assumed in order to validate the...Ch. 25 - In a population where only the total number of...Ch. 25 - Determine whether the following two sets of data...Ch. 25 - If 4 percent of a population in equilibrium...Ch. 25 - Consider a population in which the frequency of...Ch. 25 - If the initial allele frequencies are p = 0.5 and...Ch. 25 - Under what circumstances might a lethal dominant...Ch. 25 - Assume that a recessive autosomal disorder occurs...Ch. 25 - One of the first Mendelian traits identified in...Ch. 25 - Describe how populations with substantial genetic...Ch. 25 - Achondroplasia is a dominant trait that causes a...Ch. 25 - Prob. 19PDQCh. 25 - Prob. 20PDQCh. 25 - A botanist studying water lilies in an isolated...Ch. 25 - A farmer plants transgenic Bt corn that is...Ch. 25 - In an isolated population of 50 desert bighorn...Ch. 25 - To increase genetic diversity in the bighorn sheep...Ch. 25 - What genetic changes take place during speciation?Ch. 25 - Some critics have warned that the use of gene...Ch. 25 - A form of dwarfism known as Ellisvan Creveld...Ch. 25 - Prob. 28ESPCh. 25 - What are the two groups of reproductive isolating...Ch. 25 - The original source of new alleles, upon which...Ch. 25 - A number of comparisons of nucleotide sequences...Ch. 25 - Shown below are two homologous lengths of the...Ch. 25 - Recent reconstructions of evolutionary history are...Ch. 25 - Prob. 34ESP
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