Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Chapter 32, Problem 10TYPSS
MODEL Genetic diversity in living human populations is highest in Africa and decreases as a function of distance traveled by the human migration that left Africa many millennia ago (see Figure 32.21). Draw a graph to show this trend (Hint: What is the independent variable? What is the dependent variable? What kind of graph is appropriate for this kind of data? See BioSkills 2 ). Add a label where you would expect to find a data point for the Yanomamö tribe of the Amazon rain forest in South America. Why is it important to use indigenous people for this study?
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Under genetic drift, if an allele’s frequency is 1%, what is the likelihood that it will be lost from the population?
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The founder effect is a type of (genetic drift / gene flow) in which individuals in one small group of a large population (establish a new distant population / are the only survivors) and then reproduce.
Imagine two populations of fish who are part of the same species. Though they are the same species, the two populations live in slightly different habitats and have some differences in their genetic code because of this. Imagine that several fish from population A migrate to the population B and reproduce. This introduced additional genetic variation to population. This is an example of:
Group of answer choices
Mutation
Gene flow
Genetic drift
Natural selection
Chapter 32 Solutions
Biological Science (6th Edition)
Ch. 32 - True or false? Both echinoderms and vertebrates...Ch. 32 - 2. What trait(s) define(s) the vertebrates?
a....Ch. 32 - The two major lineages that make up the living...Ch. 32 - Most species of hominins are known only from...Ch. 32 - Mammals and birds are both endothermic. Which...Ch. 32 - MODEL Sketch a simple model of a generic chordate...Ch. 32 - 7. There is some evidence that pharyngeal slits...Ch. 32 - MODEL Draw a phylogeny of modem humans that would...Ch. 32 - 9. Consider the evolution of protostomes (Chapter...Ch. 32 - 10. MODEL Genetic diversity in living human...
Ch. 32 - Prob. 11PIATCh. 32 - CAUTION How is the opossum related to you? a. An...Ch. 32 - 13. Gene expression patterns can be used to test...Ch. 32 - 14. PROCESS OF SCIENCE Researchers studied mice...Ch. 32 - 15. The image of the opossum skull shows that the...Ch. 32 - Evolution often results in the co-option of a...
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- 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 driftarrow_forwardImagine a population of pea plants growing in Petaluma. 50% of the gene pool is P alleles, for purple flowers and 50% is p alleles, for white flowers. How can the frequency of the alleles change in this population over generations? Select all the correct answers. Group of answer choices genetic drift natural selection mutation gene flowarrow_forwardSuppose that global warming causes ocean rise that obliterates most of the Gulf Coast of Florida and much of its human population, and that radiation leaking from the destroyed Big Bend Nuclear Power Station causes a mutation that yields green hair in humans with the homozygous recessive mutant allele. Many years pass and a new island appears in the Gulf. This island is then colonized by an intrepid human population that is fixed for the recessive green hair allele. If the island population grows to 10,000 individuals and then an individual who is heterozygous for the green hair locus arrives on the island and mates with one of the residents, how many generations will it take for the dominant, non-green hair allele to reach a frequency of 99%? (Assume viability selection 20% in favour of the non-green allele and ignore the effects of genetic drift).arrow_forward
- Suppose that global warming causes ocean rise that obliterates most of the Gulf Coast of Florida and much of its human population, and that radiation leaking from the destroyed Big Bend Nuclear Power Station causes a mutation that yields green hair in humans with the homozygous recessive mutant allele. Many years pass and a new island appears in the Gulf. This island is then colonized by an intrepid human population that is fixed for the recessive green hair allele. If the island population grows to 10,000 individuals and then a new mutation arises once in the population, with a single individual becoming heterozygous for the green hair locus, a) What is the probability that this non-green hair allele will reach fixation by genetic drift? (Assume no selection or additional mutation at this locus). b) What is the average time to fixation of this new non-green allele?arrow_forwardChoose one sentence that best describes a consequence of genetic drift a. Alleles in small populations are less likely to become fixed than those in large populations b. Large populations tend to lose genetic diversity faster than small populations c. New mutations are equally frequent in large and small populations d. Small populations tend to lose genetic diversity faster than large populationsarrow_forwardJUST ANSWER, DON'T EXPLAIN Microevolution is described by which of the following? Select one: A. Changes in anatomical structures found in an individual when compared to ancestral forms of the species B. Changes in anatomical structures found in a population when compared to ancestral forms of the species C. Changes in the frequency of alleles in a population D. Changes in the frequency of alleles in an individualarrow_forward
- what would happen to the gene frequencies during this following scenarios? a. complete selection b. migration c. random genetic drift.arrow_forwardWhich is an example of an evolutionary adaptation? Group of answer choices constancy in the rate of accumulation of genetic changes in a molecule over time the loss of an allele in a population due to a population bottleneck fixation in a population of a selectively advantageous allele a change in frequency of a neutral allele by genetic driftarrow_forwardSuppose that recessive deleterious allele is found to be much less common than its predicted equilibrium frequency, based on the selection coefficient and mutation rate measured in modern populations. Which of the following is the best explanation for this? Note that, when selection or mutation rates change, it may take hundred of generations for population to reach its new equilibrium. A. Selection against the allele was weaker in the past than today B. Mutation rates were higher in the past C. Heterozygote advantage in some environments D. Increases lifespans have made the allele more deleterious now than it was in the Please answer asap and in short and content should not be palgarised pleasearrow_forward
- Apply the VIDA table to the evolution of sickle cell disease to justify whether it is an instance of evolution by natural selection. Answer the following questions. Is there variation in this trait in the population? How exactly does it vary? Is the trait at least partly inherited? Is there selection for this trait in a particular environment? (What is the selective pressure? And how does a trait give an advantage or disadvantage in that environment?) What is the evidence that this trait makes organisms better adapted to their environment?arrow_forwardHow does the founder effect show that Africa is where our species originated? (Hint: Think about genetic diversity.) A. Today, people living in Africa have more genetic diversity than all other people in all other areas of the world. B. Today, people living in Africa have less genetic diversity than all other people in all other areas of the world. C. Today, people living in Africa have the same genetic diversity as all other people in all other areas of the world. D. Today, people living in North America have more genetic diversity than all other people in all other areas of the world.arrow_forwardGive typing answer with explanation and conclusion Which of the following statements is false? Question 5 options: A) When insect populations are attacked with pesticides, the populations increase their mutation rates so that they can develop pesticide-resistant alleles. B) Small populations have smaller gene pools than larger populations. C) The fittest members of a population leave more offspring than less-fit individuals. D) Natural selection is responsible for most adaptive changes in populationsarrow_forward
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