EBK CAMPBELL BIOLOGY
10th Edition
ISBN: 9780136539414
Author: Reece
Publisher: VST
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Textbook Question
Chapter 1.2, Problem 2CC
Explain why "editing" is a metaphor for how natural selection acts on a population’s heritable Variation.
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explain why “editing” is a metaphor for how naturalselection acts on a population’s heritable variation
Suppose that a population is at equilibrium between mutation and selection for a deleterious recessive allele, where s = 0.5 and μ = 10−5. What is the equilibrium frequency of the allele? What is the selection cost?
The evolution of a qualitative trait in reponse to natural selection is described by the following equation,
R=h2 S
a) What is h2 and what does it measure?
b) Describe a study that would allow you to estimate h2 for a real population
Chapter 1 Solutions
EBK CAMPBELL BIOLOGY
Ch. 1.1 - Starting with the molecular level in Figure 1.3,...Ch. 1.1 - Identify the theme or themes exemplified by (a)...Ch. 1.1 - WHAT IF? For each theme discussed in this...Ch. 1.2 - Prob. 1CCCh. 1.2 - Explain why "editing" is a metaphor for how...Ch. 1.2 - DRAW IT The three domains you learned about in...Ch. 1.3 - Contrast inductive reasoning with deductive...Ch. 1.3 - Prob. 2CCCh. 1.3 - Why is natural selection called a theory?Ch. 1.3 - WHAT IF? In the deserts of New Mexico, the soils...
Ch. 1.4 - How does science differ from technology?Ch. 1.4 - MAKE CONNECTIONS The gene that causes sickle-cell...Ch. 1 - Prob. 1.1CRCh. 1 - Prob. 1.2CRCh. 1 - What are the roles of gathering and interpreting...Ch. 1 - Explain why different approaches and diverse...Ch. 1 - Prob. 1TYUCh. 1 - Prob. 2TYUCh. 1 - Prob. 3TYUCh. 1 - Prob. 4TYUCh. 1 - Prob. 5TYUCh. 1 - Which of the following best demonstrates the unity...Ch. 1 - Prob. 7TYUCh. 1 - Which of the following statements best...Ch. 1 - Which of the following is an example of...Ch. 1 - Which sentence best describes the logic of...Ch. 1 - DRAW IT With rough sketches, draw a biological...Ch. 1 - EVOLUTION CONNECTION A typical prokaryotic cell...Ch. 1 - SCIENTIFIC INQUIRY Based an the results of the...Ch. 1 - WRITE ABOUT A THEME: EVOLUTION In a Short essay...Ch. 1 - SYNTHESIZE YOUR KNOWLEDGE Can you pick out the...
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- There are three modes of natural selection: stabilizing selection, directional selection and diversifying/ disruptive selection. Describe each mode and explain how each mode affects the evolution of a population.arrow_forwardWhat is Darwinian fitness? What types of characteristics canpromote high fitness values? Give several examples.arrow_forwardRefer to the figure above. In their investigation of natural selection on Mc1r alleles (the gene that determines coat color) in Arizona pocket mice, Hoekstra et al. determined the frequency of the D and d alleles in each population. They also determined the frequency of alleles for two neutral mitochondrial DNA genes (genes that do not affect and are not linked to coat color). Why did the researchers include the mitochondrial DNA genes as part of their experimental design? Allele change for the neutral mitochondrial genes serves as an experimental group and gives information on any general background genetic difference among these populations. Allele change for the neutral mitochondrial genes serves as a control and determines coat-color differences among these populations. Allele change for the neutral mitochondrial genes serves as an experimental group and gives information on coat-color differences among these populations. Allele…arrow_forward
- What is one important advantage of using environmental DNA (eDNA), instead of traditional field-based capture techniques, to study species distributions? For a given population density, eDNA has a higher probability of detecting a species if it is present. By looking at telomere length on the chromosomes found in an environmental DNA sample, researchers can gather information about the age distribution of organisms in a population. O By looking at epigenetic marks on an environmental DNA sample, researchers can gather information about the health of the organisms in a population. All of the abovearrow_forwardGenetic variation is the product of completely random events, but acting upon this randomness is a very nonrandom process called natural selection. Explain or give an example.arrow_forwardDescribe natural selection and give an example of natural selection at work in a population. Please elaborate or explain in 10-15 sentences, please?arrow_forward
- What is the fundamental difference between selective breeding (artificial selection) and genetic engineering in terms of genetic diversity? How would you test for genetic diversity within each population? Explain.arrow_forwardList and explain the three conditions that must be met in order for a population to evolve by natural selection.arrow_forwardEugene Eisen selected for increased 12-day litter weight (total weight of a litter of offspring 12 days after birth) in a population of mice (E. J. Eisen. 1972. Genetics 72:129–142). The 12-day litter weight of the population steadily increased, but then leveled off after about 17 generations. At generation 17, Eisen took one family of mice from the selected population and reversed the selection procedure: in this group, he selected for decreased 12-day litter weight. This group immediately responded to the reversed selection: the 12-day litter weight dropped 4.8 g within 1 generation and dropped 7.3 g after 5 generations. On the basis of the results of the reverse selection, what is the most likely explanation for the leveling off of 12-day litter weight in the original population?arrow_forward
- Evolution is driven by both nonrandom and random mechanisms. Identify the mechanisms of evolution that are random and comment on how they affect allele frequencies across generations.arrow_forwardWhat is one important advantage of using environmental DNA (eDNA), instead of traditional field-based capture techniques, to study species distributions? 1.) For a given population density and sampling effort, eDNA has a higher probability of detecting a species if it is present. 2.) By looking at telomere length on the chromosomes found in an environmental DNA sample, researchers can gather information about the age distribution of organisms in a population. 3.) By looking at epigenetic marks on an environmental DNA sample, researchers can gather information about the health of the organisms in a population. 4.) All of the abovearrow_forwardNatural selection predicts that two species that came from a common ancestor should have high degree of correlation in their genomes. what aspect (use) of correlation am I using when apply it for this purpose?arrow_forward
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