Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 23, Problem 8TY
Summary Introduction
Introduction: A total of eight factors govern the process of microevolution. These factors are gene duplication, mutation, exon shuffling, horizontal gene transfer, non-random mating, natural selection, migration, and genetic drift.
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Define
a. mutation
b. natural selection
c. founder effect
d. bottleneck
e. gene flow
f. nonrandom mating
A chance event occurs that causes a population to lose some individuals (they died); hence, a loss of alleles in the population results froma. mutation.b. migration.c. selection.d. genetic drift.
Which of the following types of selection maintain variation in a population?
a.
Overdominance (Heterozygote advantage)
b.
Underdominance (Heterozygote disadvantage)
c.
Frequency-dependent selection
d.
Directional selection
e.
Both a. & b.
f.
Both a. and c.
g.
Both a. and d.
Chapter 23 Solutions
Biology
Ch. 23.1 - Prob. 1CSCh. 23.2 - Prob. 1CCCh. 23.2 - Prob. 2CCCh. 23.2 - Prob. 3CCCh. 23.3 - Prob. 1CCCh. 23.3 - Prob. 1EQCh. 23.3 - Prob. 2EQCh. 23.3 - Prob. 3EQCh. 23.4 - Genetic Drift Concept Check: How does the...Ch. 23.4 - Prob. 1CS
Ch. 23.5 - Prob. 1CCCh. 23 - Population geneticists are interested in the...Ch. 23 - The Hardy-Weinberg equation characterizes the...Ch. 23 - Prob. 3TYCh. 23 - Prob. 4TYCh. 23 - Prob. 5TYCh. 23 - Prob. 6TYCh. 23 - Prob. 7TYCh. 23 - Prob. 8TYCh. 23 - Kimuras proposal regarding neutral variation...Ch. 23 - Populations that experience inbreeding may also...Ch. 23 - Prob. 1CQCh. 23 - Prob. 2CQCh. 23 - Prob. 3CQCh. 23 - Antibiotics are commonly used to combat bacterial...Ch. 23 - Discuss die similarities and differences among...
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- What condition(s) is/are necessary for the development of both antagonistic and mutualistic coevolutionary relationships?A. Intimate pairwise interactions with one or more species.B. The agents of selection that are relevant to the populations must evolve.C. Frequency-dependent selection.D. All of the above are necessary for the development of coevolutionary relationships.arrow_forwardWhich of the following evolutionary forces tends to remove genetic variation from a population? A. Mutation B. Gene flow due to immigration into a population C. Genetic Drift D. Disassortative mating E. Non-random matingarrow_forwardGene flow occurs a. when individuals within a population interbreed. b. as a result of genetic drift. c. as a result of mutations in one population but not in another. d. when an individual migrates between two otherwise isolated populations of a species.arrow_forward
- Which of the following evolutionary forces can introduce new genetic variation into a population? a. natural selection and genetic drift b. mutation and gene flow c. natural selection and nonrandom mating d. mutation and genetic driftarrow_forwardGenetic drift is a. a change in allele frequencies due to random fluctuations. b. likely to result in allele loss or fixation over the long run. c. more pronounced in smaller populations. d. all of the above.arrow_forwardGenetic variations in natural populations develop due to: Select one: A. random mutations of the DNA. B. changes in diet. O C. environmental catastrophies. D. changes in the environment. E. individual activities.arrow_forward
- Which of the following is correct (can be more than 1): Genetic drift is an important mechanism of evolution: A. when the difference in fitness between alleles is small B. when a small number of individuals found a new population C. when the difference in fitness between alleles is large D. when population size is small E. when population size is large F. during and after a population bottleneckarrow_forwardThepopulations of Chihuahua spruce (Picea chihuahuana) have been fragmented due tochanging climatic conditions. This has resulted in:a.stabilizing selection.b.large population sizes.c.an increase in genetic diversity within populations.d.genetic drift.e.all of the choices apply.arrow_forwardThe Hardy-Weinberg equation characterizes the allele and genotypefrequenciesa. of a population that is experiencing selection for mating success.b. of a population that is extremely small.c. of a population that is very large and not evolving.d. of a community of species that is not evolving.e. of a community of species that is experiencing selection.arrow_forward
- Present-day patterns of biodiversity and genetic diversity reflect past population genetics processes. Which of the following is the most likely to have had a MAJOR contribution to present day species diversity? a. large populations b. random genetic drift c. meiosis d. emigration e. inbreedingarrow_forwardWhich of the following DOES NOT alter a [population’s genetic composition? a. random mating b. natural selectionc. Inbreedingd. Gene flow from migration e. Genetic driftarrow_forwardAdaptation can best be described as A. The change in the genetic characteristics of a population of organisms over time B. Evolutionary changes on a large scale C. Gives us Genotype frequency of a population that is not evolving D. Any feature of the organism that leads to improvement in performance in the environmentarrow_forward
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Genetic Variation and Mutation | 9-1 GCSE Science Biology | OCR, AQA, Edexcel; Author: SnapRevise;https://www.youtube.com/watch?v=bLP8udGGfHU;License: Standard YouTube License, CC-BY