BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 20.5, Problem 3LO
Summary Introduction
To determine: The method by which the sexual selection leads to evolution of secondary sexual characters.
Introduction: Natural selection is a progressive evolutionary process that is brought about by the alteration in the inheritable characteristics in a group of individuals or populations over generations. This helps in the differential selection of the species and their reproduction based on the ability to adapt
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Define sexual selection?
What determines whether a gamete is male or female? Explain why this difference predicts the two main forms of sexual selection.
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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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- Use examples to explain sexual selection and its outcomes.arrow_forwardExplain the paradox and adaptive significance of sex. Provide examples and data thatsupport the theories regarding the evolution of sexual reproduction.arrow_forwardEnumerate and give at least 5 unique mechanisms employed by organisms in order to determine the sex of the offspring. In each case, give an example of a species which represent such a scheme of producing sex(y) descendants. Put reference Mechanism Example 1 2 3 4 5 What evolutionary forces drive the turnover of these sex determination mechanisms?arrow_forward
- in sexual selection I need an explanation of why one sex is more choosy than the otherarrow_forwardWhat is the purpose of studying "Equality in the Sexes in Human Evolution"?arrow_forwardIs sexual reproduction required to generate the variability in structures and behaviors that is necessary for natural selection?arrow_forward
- Explain sexual selection (non-random mating) as a force of evolution (how does sexual selection contribute to biological change?)arrow_forwardExplain how sexual selection might lead to a)sexual dimorphism and b) members of one sex (usually male) having traits that do not enhance their survivalarrow_forwardgive one species that is classified or exhibit the following: sex-role reversal show a photograph of it with its sexual traits (body stuctures, behavior, etc) and how these traits help their reproduction. explainarrow_forward
- explain how meiosis and sexual reproduction generate genetic variability in populations?arrow_forwardWhat is meant by “sexual selection”? a. Having an XX or XY chromosome pattern determines whether one develops as a female or a male. b. Hormones during a sensitive period produce longlasting effects on anatomy and behavior. c. Some people choose to switch from one gender identity to another. d. Evolution favors characteristics that make an individual more appealing to the opposite sex.arrow_forwardDefine natural selection in relation with reproductive success ?arrow_forward
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