Which of the following statements is true? O A. Chance and random events only influence the evolutionary process in small populations. O B. Chance and random events can influence the evolutionary process in all populations, but especially in small ones. O C. Chance and random events play no role in the evolutionary process. O D. Chance and random events influence the evolutionary process in all populations in the form of natural selection. OUDLAIT

Which of the following statements is true? O A. Chance and random events only influence the evolutionary process in small populations. O B. Chance and random events can influence the evolutionary process in all populations, but especially in small ones. O C. Chance and random events play no role in the evolutionary process. O D. Chance and random events influence the evolutionary process in all populations in the form of natural selection. OUDLAIT

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter19: Population Genetics And Human Evolution

Section: Chapter Questions

Problem 3QP: How Can We Measure Allele Frequencies in Populations? Explain the connection between changes in...

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Considering the principles of mutation , natural selection , and genetic drift do you expect evolution by natural selection to occur more rapidly in small or large populations ? What about evolution by genetic drift For each answer please explain your reasoning with detail or an example .
What is neutral evolution? A. Neutral evolution does not exist. B. When certain genes are present or absent in populations due to natural selection (they are advantageous or disadvantageous). C. When certain genes are present or absent in populations regardless of selection (they are not advantageous or disadvantageous). D. When certain genes are present or absent in populations due to sexual selection (they are selected for by the opposite sex).
Which of the following conclusions are MOST likely to be supported by genetic evidence? A. Some modern-day organisms did not exist in the past. B. Some organisms found in the fossil record do not currently exist. C. Environmental change affected the fitness of individuals differently based on their traits. D. Some disease-causing traits may remain in a population because their alleles provide an advantage to heterozygotes.
What were the requirements that Charles Darwin believed were necessary for adaptive evolution? Group of answer choices A. A population contains variation for some character B. The distribution of the character in the population would change over time C. Some variants sruvive and reproduce at higher rates than other D. All of the answers are correct E. The variation is at least partially heritable
Which of the following examples (some from class) are examples of evolution by natural selection? Choose all that apply. (1 or more are correct) Group of answer choices A_Evolution of rock pocket mice population to blend in with dark lava environment B_Evolution of high prevalence of disease alleles of an endangered species whose habitat was quickly destroyed to less than 5% remaining C_Evolution of high prevalence of sickle cell allele in areas with endemic malaria D_Evolution of a small population where most of the individuals with a red-hair mutation were killed off by a storm
What is the difference between artificial selection (e.g., greyhounds that are bred for speed) and natural selection? a. In artificial selection, the genetic variation introduced into the population is limited, but in natural selection, it is not b. In artificial selection, the environment is the selective force, while in natural selection, humans are the selective force c. In natural selection, the environment is the selective force, while in artificial selection, humans are the selective force d. Unlike other species, dogs are not subject to natural selection e. Both A & C
Check all of the following that are true: a. Mutation alone is a weak force of evolution. b. Only small populations evolve by genetic drift. c. Selection is always the strongest force of evolution a population can experience. d. Overdominance occurs when there is disruptive selection favoring the homozygotes. e. It is easier to purge a population of dominant deleterious alleles compared to recessive deleterious alleles. f. Populations may change a lot or a little when migration occurs depending on how different the populations are. g. Nonrandom mating in the form of inbreeding is not considered a true evolutionary force. h. Drift and migration can offset or counterbalance the effects of selection in a population.
Which of the following processes and or mechanisms of evolution violate the assumptions of Hardy-Weinberg Equilibrium? Select all that apply. Group of answer choices A) Natural selection B) Assortative mating C) Random mating D) Genetic drift E) Mutation
Biologists sometimes say that “natural selection depends on the specific environment where a species lives.” What does this statement mean? A) A) If populations of a species are in different environments, traits that individuals need to meet their needs in each environment will appear. B) Traits can be helpful or harmful. If populations of a species are in different environments, some traits that are helpful in one environment might be harmful in another environment. C) Traits are always either helpful or harmful, and the environment of a population doesn’t matter. If populations of a species are in different environments, the same traits will always be helpful. D) Species were formed to perfectly match their environment. The traits of individuals in a species depend on the specific environment in which they were created.
In which of the following pairs do both evolutionary processes introduce new genetic variation into a population? a. natural selection and genetic drift b. mutation and gene flow c. natural selection and gene flow d. gene flow and genetic drift
Which of the following is not true of natural selection? (a) natural selection acts to preserve favorable traits and eliminate unfavorable traits (b) the offspring of individuals that are better adapted to the environment will make up a larger proportion of the next generation (c) natural selection directs the course of evolution by preserving the traits acquired during an individuals lifetime (d) natural selection acts on a populations genetic variability, which arises through mutation (e) natural selection may result in changes in allele frequencies in a population
How Can We Measure Allele Frequencies in Populations? Explain the connection between changes in population allele frequencies and evolution, and relate this to the observations made by Wallace and Darwin concerning natural selection.