Campbell Biology: Concepts & Connections, Books a la Carte Plus Mastering Biology with Pearson eText - Access Card Package (9th Edition)
9th Edition
ISBN: 9780134536347
Author: Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan, Jane B. Reece
Publisher: PEARSON
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Chapter 13, Problem 13TYK
It seems logical that natural selection would work toward genetic uniformity; the genotypes that are most fit produce the most offspring, increasing the frequency of adaptive alleles and eliminating less adaptive alleles. Yet there remains a great deal of
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Which of the following statements about genetic fitness and/or selection is false?
Group of answer choices
Individuals with low fitness have greater selection coefficients
Fitness involves both relative viability and reproductive success
Individuals with high fitness have greater selection coefficients
Selection against recessive alleles tends to be slower overall than dominant alleles because of the survival in heterozygotes
Which of the following is likely to be observed if there has been a strong positive selection on a particular genetic locus within a population?
Group of answer choices
There will be a lot of variation in DNA surrounding the genetic locus in question within the population.
There will very little variation in DNA surrounding the genetic locus in question within the population.
You will see very low frequencies of the genetic locus in question
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.
Chapter 13 Solutions
Campbell Biology: Concepts & Connections, Books a la Carte Plus Mastering Biology with Pearson eText - Access Card Package (9th Edition)
Ch. 13 - Summarize the key points of Darwins theory of...Ch. 13 - Complete this concept map describing potential...Ch. 13 - Which of the following did not influence Darwin as...Ch. 13 - Natural selection is sometimes described as...Ch. 13 - In an area of erratic rainfall, a biologist found...Ch. 13 - If an allele is recessive and lethal in...Ch. 13 - In a population with two alleles, B and b, the...Ch. 13 - Within a few weeks of treatment with the drug 3TC,...Ch. 13 - In the late 1700s, machines that could blast...Ch. 13 - Write a paragraph briefly describing the kinds of...
Ch. 13 - In the early 1800s, French naturalist Jean...Ch. 13 - Sickle-cell disease is caused by a recessive...Ch. 13 - It seems logical that natural selection would work...Ch. 13 - SCIENTIFIC THINKING Cetaceans are fully aquatic...Ch. 13 - A population of snails is preyed on by birds that...Ch. 13 - Advocates of scientific creationism and...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 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 populationarrow_forwardIn 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 driftarrow_forwardNatural selection makes an adaptive trait more common in a population. After many generations, will all individuals in the population have the same adaptive trait?arrow_forward
- In which of these examples can natural selection act on a trait and cause the population to evolve? A population that is faced with extinction but has no genetic variation A population where a lot of individuals have mutations, but none of the mutations relate to fitness A population with no genetic variation, but where individuals have very high numbers of offspring A population where a few individuals have mutations that allow them to develop traits for producing more offspring than other individualsarrow_forwardThe Hardy–Weinberg principle states that allele and genotype frequencies remain constant from one generation to the next, as long as specific conditions are met.Choose Yes or No for the conditions that must be met from the provided statements below. Mutations are exponentially occurring. All members of the population breed. Everyone produces the same number of offspring. The population is infinitely large. There is no migration in or out of the population. No net mutations are occurring. Natural selection of beneficial traits is occurring. Natural selection is not occurring. All mating is completely random. Offspring are able to migrate out of the population.arrow_forwardNatural selection is dependent on several factors, including the ability a population to survive and reproduce within a particular environment. How are both of these factors modeled?arrow_forward
- Which of the following is true about natural selection? Group of answer choices it acts on individuals it typically does not involve changes in genotype frequencies in a population it involves individuals willfully changing their genotype and/or phenotype in order to become better matched to their environment and leave more offspring it is a random process it involves humans increasing the frequency of desirable traits in a species by selecting which individuals breedarrow_forwardWhat kind of variable traits other than fur or lack of within a population might natural selection act uponarrow_forwardHow can negative traits that don't show up until old age continue in populations? (Why aren't they eliminated through natural selection?) As part of your answer, provide an example.arrow_forward
- All of the following are causes for evolutionary concern in small populations, EXCEPT: a. Unmasking of deleterious alleles. b. Natural selection can be overwhelmed by drift, and thus cannot counterbalance the effects. c. Random fixation of deleterious alleles is more likely to occur in small populations. d. Homozygosity decreases more rapidly in smaller populations compared to larger populations.arrow_forwardTRUE OR FALSE:"Natural selection works on the allelic frequencies of both lethal and beneficial mutations".arrow_forwardWhich of the following statements is NOT an observation or inference on which natural selection is based? Group of answer choices Only a fraction of an individual’s offspring may survive. Species produce more offspring than the environment can support. There is heritable variation among individuals. Modifications of an organism acquires during its lifetime can be passed to its offspring.arrow_forward
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