Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 19, Problem 14RQ
When males and females of a population look or act differently, it is referred to as.
- sexual dimorphism
- sexual selection
- diversifying selection
- a cline
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During mating season, male rams compete with each other for access to females. This describes
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the direct benefits model
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founder effects
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Selection at one locus that maintains multiple alleles in the population at equilibrium is called:
Viability selection
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Chapter 19 Solutions
Biology 2e
Ch. 19 - Figure 19.2 In plants, violet flower color (V) is...Ch. 19 - Figure 19.4 Do you think genetic drift would...Ch. 19 - Figure 19.8 In recent years, factories have become...Ch. 19 - What is the difference between micro- and...Ch. 19 - Population genetics is the study of: how selective...Ch. 19 - Which of the following populations is not in...Ch. 19 - One of the original Amish colonies rose from a...Ch. 19 - When male lions reach sexual maturity, they leave...Ch. 19 - Which of the following evolutionary forces can...Ch. 19 - What is assortative mating? when individuals mate...
Ch. 19 - When closely related individuals mate with each...Ch. 19 - What is a cline? the slope of a mountain where a...Ch. 19 - Which type of selection results in greater genetic...Ch. 19 - When males and females of a population look or act...Ch. 19 - The good genes hypothesis is a theory that...Ch. 19 - Solve for the genetic structure of a population...Ch. 19 - Explain the Hardy-Weinberg principle of...Ch. 19 - Imagine you are trying to test whether a...Ch. 19 - Describe a situation in which a population would...Ch. 19 - Describe natural selection and give an example of...Ch. 19 - Explain what a cline is and provide examples.Ch. 19 - Give an example of a trait that may have evolved...Ch. 19 - List the ways in which evolution can affect...
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- What type of selection occurs when one extreme population phenotype is favored? Group of answer choices genetic drift directional stabilizing disruptivearrow_forwardWhich type of selection is shown in the graph? Color of butterflies stabilizing selection disruptive selection directional selection Number of butterfliesarrow_forwardWhich of the following is NOT an example of sexual selection in the wild? * Peacocks showing off bright feathers to attract the peahens. Newts camouflaging in their environment so predators can't see them. Frogs singing loud songs to attract a mate. Rams butting heads and fighting to gain access to the females. INTL O 4:32 novo N42 Touch 4. %23 24 & backspace 4. 7 8 e r y ab f k enter shift C V alt ctrl altarrow_forward
- In a forest, trees that grow taller receive more sunlight and end up producing more viable seeds. Shorter trees of the same species receive less sunlight and produce few viable seeds. Over time, what type of selection will take place? directional selection stabilizing selection sexual selection disruptive selectionarrow_forwardWhen one allele is favored by Natural Selection over all other alleles, that allele will likely increase in frequency and the trait-form it produces will become more common. This is an example of Selection. Directional Stabilizing Disruptive Kinarrow_forwardThis species of Squirrel involves multiple males fighting, the strongest performs a specific dance which signals other males that he has won. The same dance also signals a female to allow the male that won to mount her. This is an example of Directive selection Stabilizing selection Intersexual selection Intrasexual selectionarrow_forward
- Sexual selection (a) occurs mainly among animals that practice polyandry (b) occurs when animals are very similar in their ability to compete for mates (c) results in animals that have lower direct fitness (d) occurs mainly among animals that practice polygyny (e) is a form of natural selectionarrow_forwardWhich one of the following would be considered an example of sexual selection? Similar death rates due to disease in both sexes of a species The presence of both male and female reproductive structures within each individual of a species Longer tailed males of a bird species mating more frequently on average than shorter tailed males of the same species Higher offspring survival in individuals homozygous for one type of allele compared to individuals homozygous for a different allele at the same locus The ability of a species to utilize either asexual or sexual reproductionarrow_forwardWhich 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_forward
- During mating season, male rams compete with each other for access to females. This describes (please just select one answer the one the best fits) intersexual selection intrasexual selection the direct benefits model Hamilton-Zuk hypothesis Fisherian sexual selectionarrow_forwardTwo males are fighting for territory that will increase the probability of mating success. Which term best describes this activity? O Intrasexual selection Intersexual selection Artificial selection O Mutationarrow_forwardMatch each of the following scenarios to the term that best describes it. Having more offspring because you can catch more food Being a puppy that is preferred over its siblings by a dog breeder [Choose ] Being richer and hence having better genes [Choose ] Natural Selection Sexual Selection Having more offspring because of alluring Eugenics tail feathers Artificial Selection [Choose ]arrow_forward
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