CAMPBELL BIOLOGY (18W)
12th Edition
ISBN: 9780136858256
Author: Urry
Publisher: PEARSON
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Chapter 25.6, Problem 2CC
Summary Introduction
To describe: An evolutionary trend that might occur in Myxoma virus or rabbit when a rabbit population has its first encounter with the virus.
Concept introduction: Myxoma virus is a lethal virus that kills 98.8% of European rabbits exposed to the virus for the first time. Myxoma virus is used as a biological agent against the rabbit population in many countries.
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Panthers are also susceptible to a respiratory infection [feline calicivirus]. Individuals in a population, who are homozygous dominant or heterozygous for genes encoding parasite or pathogen resistance, are more likely to resist an infection or parasite. Currently, population estimates of the Florida panther range from 100 – 160 individuals. Let’s assume that the population equals 160. During a particularly bad calicivirus outbreak, 40 Florida panthers die as a result of the infection. Using this information, answer the following questions utilizing the Hardy – Weinberg equation when necessary.
What is the most likely genotype of the affected panthers that died from the respiratory infection? Use the letter “A” for your symbol.
2. What percentage of the population is most likely resistant to the calicivirus infection?
Panthers are also susceptible to a respiratory infection [feline calicivirus]. Individuals in a population, who are homozygous dominant or heterozygous for genes encoding parasite or pathogen resistance, are more likely to resist an infection or parasite. Currently, population estimates of the Florida panther range from 100 – 160 individuals. Let’s assume that the population equals 160. During a particularly bad calicivirus outbreak, 40 Florida panthers die as a result of the infection. Using this information, answer the following questions utilizing the Hardy – Weinberg equation when necessary.
What is the most likely genotype of the affected panthers that died from the respiratory infection? Use the letter “A” for your symbol.
What percentage of the population is most likely resistant to the calicivirus infection?
Using the information given for the inheritance of pathogen resistance, construct a Punnett square crossing a heterozygous individual to a homozygous…
Which evolutionary mechanisms (natural selection, mutation, genetic drift, or gene flow) would you need to understand to predict the success of genetically modified mosquitoes to:
1. Drive the mosquito population to extinction?
2. Replace the mosquito population with genetically modified mosquitoes that can not transmit malaria?
Chapter 25 Solutions
CAMPBELL BIOLOGY (18W)
Ch. 25.1 - What hypothesis did Miller test in his classic...Ch. 25.1 - How would the appearance of protocells have...Ch. 25.1 - MAKE CONNECTIONS In changing from an "RNA world"...Ch. 25.2 - Describe an example from the fossil record that...Ch. 25.2 - WHAT IF? Your measurements indicate that a...Ch. 25.3 - The first appearance of free oxygen in the...Ch. 25.3 - What evidence supports the hypothesis that...Ch. 25.3 - WHAT IF? What would a fossil record of life today...Ch. 25.4 - Explain the consequences of plate tectonics for...Ch. 25.4 - What factors promote adaptive radiations?
Ch. 25.4 - Prob. 3CCCh. 25.5 - Explain how new body forms can originate by...Ch. 25.5 - Why is it likely that Hox genes have played a...Ch. 25.5 - Prob. 3CCCh. 25.6 - How can the Darwinian concept of descent with...Ch. 25.6 - Prob. 2CCCh. 25 - Describe the roles that montmorillonite clay and...Ch. 25 - What are the challenges of estimating the ages of...Ch. 25 - What is the "Cambrian explosion," and why is it...Ch. 25 - Explain how the broad evolutionary changes seen in...Ch. 25 - How could changes in a Single gene or DNA region...Ch. 25 - Explain the reasoning behind the Statement...Ch. 25 - Level 1: Knowledge/Comprehension 1. Fossilized...Ch. 25 - The oxygen revolution changed Earth's environment...Ch. 25 - Prob. 3TYUCh. 25 - Prob. 4TYUCh. 25 - Prob. 5TYUCh. 25 - Prob. 6TYUCh. 25 - Prob. 7TYUCh. 25 - EVOLUTION CONNECTION Describe how gene flow,...Ch. 25 - Prob. 9TYUCh. 25 - WRITE ABOUT A THEME: ORGANIZATION You have seen...Ch. 25 - Prob. 11TYU
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- 3. Describe the effect of malaria on the frequency of the Hbs allele in areas where is common in areas with malaria, which individual would survive better and leave more offspring-an individual with two HbA alleles or an individual with one HbA allele and one Hbs allele? Given this, would you expect the Hbs allele to be common or rare in populations living with malaria? H lonve more offspring witharrow_forward3. Describe the effect of malaria on the frequency of the Hbs allele in areas where is common in areas with malaria, which individual would survive better and leave more offspring-an individual with two HbA alleles or an individual with one HbA allele and one Hbs allele? Given this, would you expect the Hbs allele to be common or rare in populations living with malaria?arrow_forwardThe method of applying the molecular clock to determine the timing of the most recent common ancestor of HIV to 1930 was used to.... O 1. Test the hypothesis that HIV jumped from a bat population into humans 2. Test whether HIV was circulating in the human population at the same time as the Spanish Flu influenza A virus O 3. Calculate the divergence time between HIV-1 and HIV-2 O 4. Test whether HIV was spread through a contaminated polio vaccine in the 1950s O 5. Estimate the rate of evolution for all human retrovirusesarrow_forward
- Q5. Which of the following is FALSE? If a genetic disease reduces fertility and the allele that causes the disease offers no other advantage, the allele will likely eventually disappear, due to natural selection. Natural selection does not favor individuals who are homozygous for the sickle-cell allele, because these individuals typically die before they are old enough to reproduce. Individuals who are heterozygous HbA/HbS are protected from malaria, and this is why sickle-cell anemia persists in wetter, mosquito-prone regions in Africa. O In regions where malaria does not occur, individuals who are heterozygous HbA/HbS have a selective advantage over those who are homozygous for the normal hemoglobin allele (HbA).arrow_forwardDo you think a variation in the human genome that confers resistance to coronaviruses (SARS-COV-2) Will be selected for in the human population through future human generations? why or why not? Consider covid 19 morality rates, the reproductive ages of those who are most at risk, economic factors, etc. Pathogens evolve over time as well, what effect if any could this have on human evolution?arrow_forwardWhat is the relationship between pandemics and evolution? Use the word: evolution DONT COPY FROM GOOGLE!arrow_forward
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