Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 20.2, Problem 3R
Summary Introduction
To review:
The conditions in which the nonrandom mating can and cannot lead to the evolution.
Introduction:
The nonrandom mating can be present when the probability of the mating of two individual in a population is not same as for all another possible pair in the population. In this, the mating of the closely related individuals can be promoted or the mating of the distantly related individuals can be promoted.
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Explain the concept of Co-evolution.
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O Due to incompatible interactions between inherited genes, a hybrid fetus is unable to develop, and is aborted.
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O A female spider of one species does not respond to the mating display of a male of a closely related species.
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Life: The Science of Biology
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- Assume you are studying a population of ocean shrimp that reproduce asexually. You sequence the ocean shrimp and the species that is their closest living relative that reproduces sexually. You find that the asexually reproducing species has a higher number of mutations in the genome. This finding would provide support for which of the following ideas? Linkage disequilibrium Stabilizing selection Disruptive selection Muller's ratchetarrow_forwardDescribe the major components of the runaway sexual selection hypothesis.arrow_forwardDescribe how genetic drift can result in speciation.arrow_forward
- Darwin’s idea for the mechanism of evolution is called the Theory of Natural Selection. One important part of the theory says that there is variation in a population. In sexually mating eukaryotic organisms, where does most of the variation come from?arrow_forwardADJUST Negative assortative mating means that organisms choose mates that are different from themselves. If negative assortive mating occurs in a population, what would expect to happen to genotype frequency over generations? O a) Frequency of the heterozygous genotype will increase. b) Frequency of the homozygous genotypes will decrease. O c) Frequency of the homozygous genotypes will increase. O d) Both A and B AUTO ||||||||| Cancel Revertarrow_forwardWhich of the following forms of reproductive isolation illustrates a prezygotic barrier to gene flow? O Species A forms hybrids with species B and the hybrids are able to breed back with either of the two parent species to produce healthy fertile offspring. O Two closely related birds, the lazuli bunting and indigo bunting, sing similar songs to attract mates and even though human ears can not distinguish them the females never make wrong choices in choosing who to mate with. O Two species of turtles living in a large lake have different ecological requirements and never interact. O Several species of corrals in a Honduras corral reef release gametes about the same time but inter- specific attraction of gametes does not occur. O All but one of these illustrates a type of prezygotic barrier to gene flow.arrow_forward
- Which of the following statements about the forces that drive evolution is TRUE? Unlike the other evolutionary forces, natural selection is the only force that improves the match between the organism and its environment. Unlike the other evolutionary forces, gene flow is the only force that causes populations to become more different. Unlike the other evolutionary forces, mutation is the only force that decreases genetic variability. Unlike the other evolutionary forces, nonrandom mating is the only force that changes allele frequency.arrow_forwardThe biological species concept is based on the assumption that species are reproductively isolated and do not share genes. And yet a number of organisms that are considered different species hybridize (mate and exchange genes). Hybridization between different species is more common in plants than in animals. Propose some possible reasons for this difference.arrow_forwardExplain sexual selection (non-random mating) as a force of evolution (how does sexual selection contribute to biological change?)arrow_forward
- Provide three distinct examples of two gender families, including those with multiple parents. Please include an explanation as to why these family structures have evolved and why they are adaptive in these organisms.arrow_forwardMutations can be considered one of the raw materials of evolution because they cause mating to remain random. usually cause species to become extinct. contribute to new variations in organisms. are usually beneficial to the organism in which they appear.arrow_forwardDarwin was the first person to note that evolutionary outcomes are probabilistic, meaning that they depend on the likelihood of outcomes rather than on certainties. Explain what this means in the context of Darwin’s theory of how evolution occurs? That is, how is Darwin’s theory is dependent upon the chances of a certain outcome and not on the absolute certainty of any particular outcome?arrow_forward
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