Which of the following statements correctly describes the conditions of microevolution? Select one: a. Mutations happen randomly, and the environment provides selective pressure. b. Mates are chosen based on specific traits, and the bottleneck effect is prevented. c. Genes to flow from one population to another, and random mating occurs. d. The population is closed, and individuals are not allowed to immigrate or emigrate

Which of the following statements correctly describes the conditions of microevolution? Select one: a. Mutations happen randomly, and the environment provides selective pressure. b. Mates are chosen based on specific traits, and the bottleneck effect is prevented. c. Genes to flow from one population to another, and random mating occurs. d. The population is closed, and individuals are not allowed to immigrate or emigrate

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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Which of the following is/are assumptions made under the Hardy-Weinberg equilibrium principle? A. Mutations are introduced into the gene pool at a regular frequency. B. New alleles may be introduced to the population by migration. C. Gametes combine at random. D. The fittest individuals in a population are most likely to reproduce. E. Allele frequencies change at random from one generation to the next.
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.
Hardy Weinberg equilibrium (HWE) describes a situation in which the relative frequencies of alleles do not change over generations. which of the following could prevent HWE from being maintained? A. New mutations B. All individuals reproducing equally C. Random mating D. No individuals entering the population
According to the Hardy-Weinberg law of equilibrium: Question 1 options: A) In absence of mutation and natural selection, the frequencies of the genotypes will remain stable because no evolutionary change takes place. B) In absence of gene flow, the frequencies of the genotypes will remain stable because no evolutionary change takes place. C) In absence of genetic drift, the frequencies of the genotypes will remain stable because no evolutionary change takes place. D) All of the above. E) None of the above.
If reinforcement is weak and hybrids are not completely infertile, a. genetic divergence between populations may be overcome by gene flow. b. speciation will occur 100% of the time. c. gene flow between populations will be impossible. d. the speciation will be more likely than if hybrids were completely infertile.
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.
Identify each of the following reproductive barriers as prezygotic or postzygotic. a. One lilac species lives on acidic soil, another on basic soil. b. Mallard and pintail ducks mate at different times of the year. c. Two species of leopard frogs have different mating calls. d. Hybrid offspring of two species of jimsonweed always die before reproducing. e. Pollen of one kind of pine tree cannot fertilize another kind.
Which of the following examples refers to microevolution? A.In a population of mice, individuals with dark fur are cryptic against the dark soil in their habitat and have higher fitness. Many generations later, the proportion of the population with the allele for dark fur has increased B. Two populations of the same species are reproductively isolated (no allels/individual , moving between the populations) Over many generations they become so different that they diverge into separate species C.In a population of lizards, a random event causes one allele to be lost from the population. So, future generations have a lower proportion (zero) of that alele.
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 Which of the following is true based on this table? A.) C is recessive and M is dominant B.) M is recessive and C is dominant C.) Neither allele is dominant D.) C is dominant in population 1 and M is dominant in population 2
Which aspect(s) of natural selection is(are) illustrated by the figure below? Check ALL answers that apply. A. Variation among individuals must be genetically transmissible to the next generation. B. Variation must exist in a population. C. Variation among individuals leads to differences in lifetime reproductive success. D. More individuals are produced each generation than the environment can support, resulting in competition for survival.
Match the following statements with the appropriate term The terms are: a.Genetic polymorphism b. Stabilizing selection c. Directional selection d.gene flow e. Vestigial f.heterochrony g. Cline i. Polyploidy j. genetic drift L. Natural selection m. Sexual dimorphism n. Adaptation o. Homology p. Convergence q. Disruptive selection Match the following statements with the appropriate term random fluctuation in gene pool (e.g., bottleneck & founder effect) Answer 1 mutational change that results in individuals with more than two sets of chromosomes, sometimes leading to a distinct species Answer 2 when adult males and adult females of the same species differ in their physical appearance Answer 3 similar adaptations resulting from a common ancestor (for example, all canines have long snouts because their common ancestor did, too). Answer 4 genetic input from other populations Answer 5 favours intermediate variants by acting against both extremes Answer 6 accumulation of…
Under a simple model, the evolution of asexual reproduction strategies will take over a population. The model relies on two assumptions. Which of the following are the assumptions? a. Reproductive mode does not affect how many offspring are produced by a female. b. Reproductive mode does not affect the sexual selection on males c. Reproductive mode does not affect the probability of offspring survival d. Both a. and b. e. Both a. and c.