Biology
12th Edition
ISBN: 9781260494570
Author: Raven, Peter
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 20.1, Problem 2LO
Summary Introduction
To determine: Theimportance and extent of variation within populations.
Introduction: The dominant allele masks the expression of the recessive allele. Therefore the dominant allele is expressed in homozygous and heterozygous genotype while the recessive
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Chapter 20 Solutions
Biology
Ch. 20.1 - Define evolution and population genetics.Ch. 20.1 - Prob. 2LOCh. 20.2 - Explain the HardyWeinberg principle.Ch. 20.2 - Describe the characteristics of a population that...Ch. 20.2 - Prob. 3LOCh. 20.3 - Define the five processes that can cause...Ch. 20.3 - Prob. 2LOCh. 20.4 - Prob. 1LOCh. 20.4 - Prob. 2LOCh. 20.4 - Demonstrate how the success of different...
Ch. 20.5 - Prob. 1LOCh. 20.5 - Prob. 2LOCh. 20.5 - Prob. 3LOCh. 20.6 - Define frequency-dependent selection, oscillating...Ch. 20.6 - Prob. 2LOCh. 20.7 - Define and contrast disruptive, directional, and...Ch. 20.7 - Prob. 2LOCh. 20.8 - Explain how experiments can be used to test...Ch. 20.9 - Prob. 1LOCh. 20.9 - Prob. 2LOCh. 20.10 - Prob. 2LOCh. 20 - If all white cats died, what proportion of the...Ch. 20 - Assuming that the values on the x-axis represent...Ch. 20 - Prob. 3DACh. 20 - Prob. 4DACh. 20 - Examine the index of copper tolerance on nonmine...Ch. 20 - Prob. 6DACh. 20 - Why are rare alleles particularly likely to be...Ch. 20 - Prob. 2IQCh. 20 - Prob. 3IQCh. 20 - Prob. 4IQCh. 20 - Prob. 5IQCh. 20 - Prob. 6IQCh. 20 - Prob. 7IQCh. 20 - Prob. 8IQCh. 20 - Prob. 9IQCh. 20 - Assortative mating a. affects genotype frequencies...Ch. 20 - When the environment changes from year to year and...Ch. 20 - Many factors can limit the ability of natural...Ch. 20 - Stabilizing selection differs from directional...Ch. 20 - Founder effects and bottlenecks are a. expected...Ch. 20 - Relative fitness a. refers to the survival rate of...Ch. 20 - For natural selection to result in evolutionary...Ch. 20 - Prob. 8UCh. 20 - In a population of red (dominant allele) or white...Ch. 20 - Genetic drift and natural selection can both lead...Ch. 20 - Prob. 3ACh. 20 - Prob. 4ACh. 20 - In Trinidadian guppies a combination of elegant...Ch. 20 - On large, black lava flows in the deserts of the...Ch. 20 - Based on a consideration of how strong artificial...
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- Explain how harmful recessive alleles can persist in populations, even though they prevent homozygous individuals from reproducing.arrow_forwardExplain the stabilizing selection effects on the phenotypic mean and the amount of phenotypic variation present in a population.arrow_forwardExplain why the genetic structure of populations changes across space and time?arrow_forward
- Explain the role of genetic drift in shaping the genetic landscape of populations. Compare and contrast genetic drift with other evolutionary forces, such as natural selection, highlighting their respective contributions to population genetic variation.arrow_forwardExplain the disruptive selection effects on the phenotypic mean and the amount of phenotypic variation present in a population.arrow_forwardDescribe the genetic origins of biological variation.arrow_forward
- Describe the three types of variation within a population. Morphological Behavioral Physiologicalarrow_forwardExplain the directional selection effects on the phenotypic mean and the amount of phenotypic variation present in a population.arrow_forwardexplain how natural selection works and how it affects populations?arrow_forward
- Define the term fitness and relate it to the meaning of selection coefficient.arrow_forwardDescribe the Hardy-Weinberg law and explain the conditions that must be met for it to hold true. Apply the Hardy-Weinberg law in analyzing population genetics for gene frequency, sex linkage, equilibrium, and heterozygote frequencyarrow_forwardExplain : Populations of organisms evolve over generations to have more individuals with favorable traits.arrow_forward
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