When taking the question, it would appear as: Consider global warming, a continual gradual increase in average temperatures. How might you expect this to affect natural selection? A.environmental changes are unpredictable, and natural selection is a random process, so it is difficult to predict outcome B.species from warmer climates are likely to expand their ranges into higher latitudes C.traits that increase reproductive success under warmer temperatures are likely to increase in frequency in a population D.the stress caused by higher temperatures will increase mutation rates

When taking the question, it would appear as: Consider global warming, a continual gradual increase in average temperatures. How might you expect this to affect natural selection? A.environmental changes are unpredictable, and natural selection is a random process, so it is difficult to predict outcome B.species from warmer climates are likely to expand their ranges into higher latitudes C.traits that increase reproductive success under warmer temperatures are likely to increase in frequency in a population D.the stress caused by higher temperatures will increase mutation rates

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter19: Evolutionary Change In Populations

Section: Chapter Questions

Problem 8TYU

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You are asked to assess whether a population of endangered salamanders can adapt to warming climate in their preferred habitat. The salamanders vary at a locus that determines adaptation to temperature, and the warming climate creates selection favoring one of two alleles at that locus. Drawing on what you know about natural selection and genetic drift, what information would you need to know about the salamanders to determine whether the allele that improves their adaptation to warmer climates will become fixed in the population? Strictly no plagiarism.
Many species of birds choose their mates based on how brightly colored they are. If feather color is heritable, how would this violate the assumptions required for a population to be in Hardy-Weinberg equillibrium? HW equilibrium would cause mutations in such a species. A. This is a founder effect В. This is a bottleneck effect C. OD. Mating is non-random. Alleles for brightly colored phenotypes might become more common in the species and allele frequency would change.
Consider a hypothetical beetle population, in which beetle colour variesalong a spectrum from light to dark green. When introduced to anenvironment characterized by light green moss and dark green shrubs,both light and dark green beetles have higher fitness than medium greenbeetles. Which of the following terms best describes this situation? Select one:O a. Stabilizing selectionO b. Directional selectionO c. Disruptive selectionO d. Sexual selection
A. The Hardy-Weinberg Equilibrium is important because it serves as a null hypothesis in studies that evaluate evolution of species. it explains how evolution works. it predicts how allele and genotype frequencies will change over time. it clarifies how traits are passed from parent to offspring. B. Hardy-Weinberg Equilibrium occurs frequently in natural populations. predicts changes in allele and genotype frequencies. is inhibited by random mating. assumes large population sizes.
a. What effect does combining genetic drift and natural selection have on beneficial mutations? b. How would you it change if population size increases
How would the graph of the number of individuals of a population that has experienced disruptive selection be different than the normal distribution? Select all that apply. a There would be more individuals at the extremes. b There would be one peak. c There would be more individuals in the middle. d There would be no difference from the normal distribution. e There would be two peaks.
Alternatively, selection may be performed during mating, where mating is done after a selection process of one of the sexes. The surviving individuals can pass on their (1) to the next generation. When these variations are sustained over a long time and the population changes so that it can no longer (2) with the parent population, a new species is said to have evolved.
Consider a gene with two alleles, C and M. The table below describes fitness for different genotypes in two populations. Fitness CC CM MM Population 1 1.0 1.0 0.6 Population 2 0.9 0.9 1.0 Assume that both populations begin with frequencies of 0.5 for each allele, population size is infinite, and there is no migration between populations. Based on the table, how would you expect the frequency of C to change over time in population 1? Group of answer choices A.) frequency of C will increase B.) frequency of C will decrease C.) frequency of C will stay the same D.) frequency of C will change randomly
Natural selection acts on phenotypes within a population. As a result, over time, the phe- notypic frequencies in a population can change. The graph below shows how the pheno- type of a population changed after selection occurred. Number of Individuals B Value of Phenotype A graph that shows how phenotypic frequency changed before and after selection. с population after selection Which of the following scenarios would most likely result in the phenotypic change shown in the graph above? D original population A A population of rats live on the ground and in short trees. A tree-dwelling snake that preys on the rats is introduced into the area. Warming of the arctic tundra reduces the average snow cover that lighter-colored arctic foxes rely on for camouflage. Darker-colored arctic foxes are better suited to the ex- posed moss and grass habitat. Robins that lay smaller-than-average clutches of eggs produce fewer viable offspring, while larger-than-average clutches of eggs result in…
The vgll3 locus is responsible for the age at which salmon mature. The vgll3 L allele causes salmon to mature earlier. This is the data on the frequency of the vgll3 L allele collected from Alaskan salmon over the course of 30 years. Which of the following describes whether this population is at Hardy-Weinberg equilibrium, and why? A - This population is not at Hardy-Weinberg equilibrium because there is evidence of selection against earlier maturing salmon. B - This population is at Hardy-Weinberg equilibrium because there is no overall trend in allele frequency over the study period. C - This population is not at Hardy-Weinberg equilibrium because there is evidence of the introduction of new mutations causing salmon to mature earlier. D - This population is at Hardy-Weinberg equilibrium because including salmon from six rivers ensures a large and genetically stable population.
When discussing natural selection and behaviour, we often say that members of a species have certain behavioural traits because those traits are adaptive, in the sense that they increase inclusive fitness relative to alternative forms of those traits that have existed in the past. Instead of emphasizing the adaptiveness of behavioural traits, some biologists describe natural selection as a process that operates on nervous system traits, increasing the prevalence within a population of particular patterns of neural circuitry and neurobiological mechanisms. As an alternative to emphasizing either the behaviour or the nervous system, some biologists describe natural selection as a process that operates on genes; according to this perspective, certain forms of certain genes (ie., particular alleles) increase in prevalence within a population relative to alternative forms of those genes. Which, if any, of these three perspectives on natural selection and behaviour do you think is the most…
Consider a gene with two alleles, C and M. The table below describes fitness for different genotypes in two populations. Fitness CC CM MM Population 1 1.0 1.0 0.6 Population 2 0.9 0.9 1.0 Assume that both populations begin with frequencies of 0.5 for each allele, population size is infinite, and there is no migration between populations. Based on the table, how would you expect the frequency of M to change over time in population 2?