Which of the following statements about evolution by genetic drift is correct? -The many neutral alleles currently in the population will eventually go extinct except for one. -In general, dominant alleles will persist longer in the population. -Recessive alleles tend to disappear from the population sooner. -The rates of evolution by genetic drift usually do not change much with different population sizes. -All of the above

Which of the following statements about evolution by genetic drift is correct? -The many neutral alleles currently in the population will eventually go extinct except for one. -In general, dominant alleles will persist longer in the population. -Recessive alleles tend to disappear from the population sooner. -The rates of evolution by genetic drift usually do not change much with different population sizes. -All of the above

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter11: Evolution And Its Processes

Section: Chapter Questions

Problem 7RQ: In which of the following pairs do both evolutionary processes introduce new genetic variation into...

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Evolution is a change in frequencies of alleles in the gene pool of a population. This definition of evolution was developed a result of the work in the 20th century by Hardy and Weinberg. Through mathematical modeling based on probability, they concluded that allele and genotype frequencies in a population will remain constant from generation to generation absence of evolutionary influences. Evolution will not occur in a population if seven conditions are met: 1. mutation is not occurring 2. natural selection is not occurring 3. the population is infinitely large 4. all members of the population breed 5. mating is totally random 6. everyone produces the same number of offspring 7. there is migration in or out of the population One of the criteria in the prompt above has been mis-typed. Correct the erroneous phrase so evolution will NOT occur.A) (5) There is sexual selection.B) (1) Mutation occurs within the population.C) (4) The fittest members of the population breed.D) (7)…
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).
An allele with no effect on fitness arises in a population through mutation and increases in frequency due to genetic drift. This is an example of....? Group of answer choices neither evolution or natural selection both evolution and natural selection evolution only natural selection only
In the modern reckoning of evolution by natural selection, what is the most important feature that allows an allele to be more represented over time in a population? The allele makes the organisim stronger. The allele allows the organisim to produce more breeding offspring. The allele allows the organisim to eat more readily. The allele allows the organsims to escape predators readily.
Regardless of the rate of evolutionary change, the product of genetic alterations is ultimately tested by Natural Selection. Gradualism accounts for the constant yet slow linear modification of a population while punctuated equilibrium accounts for long periods of stasis followed by rapid divergence (multiple forms emerging). -First, in no more than two sentences, explain Natural Selection (use your own words).-Second, explain the dynamics of selection. If natural selection acts on individuals, how might itshift allele frequencies in a population?-Third, explain gradualism and punctuated equilibrium in terms of selection. When discussingpunctuated equilibrium, remember that selection is still active in times of stasis
Which of the following statements most accurately describes the effects of genetic drift on a population? a. Populations of the same size will follow the same evolutionary trajectory when evolving due to drift. b. Genetic drift has the potential to drive evolution in all populations. c. Allele frequencies in a population of infinite size will ultimately drift to fixation or loss. d. The loss of otters in California due to excessive hunting cause a founder effect.
A population of birds lives on a mountain. In this population, there are red-winged birds, orange-winged birds, and blue-winged birds. A predatory snake eats more of the blue-winged birds because they are not well camouflaged on the red and orange plants that grow on the mountain. This is an example of which mechanism of evolution? Group of answer choices Gene flow Cryptic coloration Natural selection Sexual selection Genetic drift
Which of the following statements about genetic drift is correct? -The effect of genetic drift only shows up in populations with few individuals. Large populations are not subjected to genetic drift. -If the genetic drift is the only evolutionary force influencing a population, then given long enough time, the heterozygosity in the population will always decrease to zero. -Usually, the A allele in the population will be fixed by genetic drift, if A is dominant over a. -The effect of genetic drift will be more prominent if the allele has a strong deleterious effect on the fitness of the individual carrying the allele. -None of the above
What is the role of variations in a evolution _if heterozygosity is reduced,what happens to the potential for evolution?the phenotype and genotype of a population is due to a mosaic of random and directed process.some of these have to do with history,some are related to adaptation etc.As completely as possible , discuss the role of chance and direction in evolution and in determining the phenotype of a population
In order for evolution to occur via natural selection on a particular trait, which of the following must be present for that trait? Which out of the 4 answers below is correct? Only 1 answer is correct Variation, mutations, fitness consequences Variation, fitness consequences, mode of inheritance Genetic recombination, variation, mutations Mutations, fitness consequences, mode of inheritance
How can Darwin's finches explain natural selection and descent with modification? What is another example of natural selection and descent with modification? In both of your answers, you should describe the trait that was selected for/against and why this trait was an advantage/disadvantage. Plus, state how natural selection changed the population over time.
What is neutral evolution? A. When certain genes are present or absent in populations regardless of selection (they are not advantageous or disadvantageous). B. When certain genes are present or absent in populations due to sexual selection (they are selected for by the opposite sex). C. When certain genes are present or absent in populations due to natural selection (they are advantageous or disadvantageous). D. Neutral evolution does not exist.

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		-The many neutral alleles currently in the population will eventually go extinct except for one.
		-In general, dominant alleles will persist longer in the population.
		-Recessive alleles tend to disappear from the population sooner.
		-The rates of evolution by genetic drift usually do not change much with different population sizes.
		-All of the above