Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 21, Problem 13TYK
Summary Introduction
To review:
The differences and similarities between sexual selection, disruptive selection, and nonrandom mating.
Introduction:
Microevolution is the evolution of an organism by showing variations in traits governed by genotype as well as
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Sexual selection tends to cause bigger size,more elaborate weaponry, or brighter colors in males. Is this an example of stabilizing,directional, or disruptive selection?
Which of the following is the best description of sexual selection?
a.
Sexual selection is the differential reproductive success due to variation in acquiring immunity from mates.
b.
Sexual selection is the differential reproductive success due to variation in survival from social selection.
c.
Sexual selection is the differential reproductive success due to variation in acquiring mates or mating success.
d.
Sexual selection is the differential survival success due to variation in avoiding mates or mating success.
How does competition influence natural selection? Is the presence of competitors a selective force?
Chapter 21 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 21.1 - If a population of skunks includes some...Ch. 21.1 - Prob. 2SBCh. 21.1 - What factors contribute to phenotypic variation in...Ch. 21.2 - Prob. 1SBCh. 21.2 - Why is the Hardy-Weinberg principle considered a...Ch. 21.2 - Prob. 3SBCh. 21.3 - Which agents of microevolution tend to increase...Ch. 21.3 - Which mode of natural selection increases the...Ch. 21.3 - In what way is sexual selection like directional...Ch. 21.4 - How does the diploid condition protect harmful...
Ch. 21.4 - Prob. 2SBCh. 21.4 - Prob. 3SBCh. 21.5 - How can a biologist test whether a trait is...Ch. 21.5 - Why are most organisms adapted to the environments...Ch. 21 - The reason spontaneous mutations do not have an...Ch. 21 - The phenomenon in which chance events cause...Ch. 21 - Prob. 3TYKCh. 21 - Prob. 4TYKCh. 21 - Prob. 5TYKCh. 21 - Which of the following represents an example of...Ch. 21 - A population of mice is at HardyWeinberg...Ch. 21 - If the genotype frequencies in a population are...Ch. 21 - An Eastern European immigrant carrying the allele...Ch. 21 - If a storm kills many small sparrows in a...Ch. 21 - Prob. 11TYKCh. 21 - Discuss Concepts Many human diseases are caused by...Ch. 21 - Prob. 13TYKCh. 21 - Apply Evolutionary Thinking Captive breeding...Ch. 21 - Prob. 15TYKCh. 21 - Design an experiment to test the hypothesis that...Ch. 21 - Peter and Rosemary Grant of Princeton University...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Which of the following situations will lead to natural selection? a. The seeds of two plants land near each other and one grows larger than the other. b. Two types of fish eat the same kind of food, and one is better able to gather food than the other. c. Male lions compete for the right to mate with females, with only one possible winner. d. all of the abovearrow_forwardDescribe How is selective breeding similar and different from natural selection?arrow_forwardNatural and sexual selection both lead to evolution, but these processes can work against each other. Differentiate between these two forms of selection and give an example of a situation where natural selection reduces mate choice and sexual selection reduces survival.arrow_forward
- Selection may also act against heterozygotes. How do allele frequencies change if the two homozygotes have equal fitness, but heterozgotes have a 50% reduced fitness? Explain what happens and whyarrow_forwardWhat is sexual selection? How is sexual selection similar to and different from other forms of natural selection?arrow_forwardSelection may also act against heterozygotes. How do allele frequencies change if the two homozygotes have unequal fitness, but heterozgotes have a constant 50% reduced fitness? Simulate allele frequency changes with multiple values of p0 (between 0 and 1). can you explain what happens and whyarrow_forward
- The good genes model of sexual selection is a popular hypothesis for mate choice. What is an underlying flaw with the hypothesis that must be explained?arrow_forwardFor a chamelons ability to color change, what type of selection (directional selection, stabilizing selection, disruptive selection, sexual selection, etc) would this trait be under?arrow_forwardName some traits for which you think humans exhibit nonrandom mating. Is mating for these traits likely to be positive or negative assortative mating? Name some traits for which you think people mate randomly. How could you test whether mating for these traits is random?arrow_forward
- Assume you are studying a species of slug where the eggs are fertilized and transferred to the male. As a result the male is not able to increase reproductive success by mating with multiple partners. Therefore which of the following about sexual selection in this species is not true? Females are more likely to develop traits that signal genetic quality to males. Females will be able to increase reproductive success with increased mating partners. Sexual selection in males will lead them to be choosy with what females they mate with. Sexual selection in males will lead them to mate indiscriminately when they find a female.arrow_forwardExplain sexual selection (non-random mating) as a force of evolution (how does sexual selection contribute to biological change?)arrow_forwardIn your own words, how does Competition and selection support natural selection? Use at least 1 example from the Beaks of Finches lab in your answer.arrow_forward
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