Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 19, Problem 14RQ
When males and females of a population look or act differently, it is referred to as.
- sexual dimorphism
- sexual selection
- diversifying selection
- a cline
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Which of these conditions should completely prevent the occurrence of natural selection in a population over time?
Group of answer choices
Variation between individuals is not heritable.
The environment is changing at a relatively slow rate.
The population lives in a habitat where there are no competing species present.
The population size is large.
When males and females of a population look or act differently, it is referred to as ________. a. sexual dimorphism b. sexual selection c. diversifying selection d. a cline
A population of a species evolving toward a favored extreme trait is _____.
disruptive selection
directional selection
stabilizing selection
artificial selection
Chapter 19 Solutions
Biology 2e
Ch. 19 - Figure 19.2 In plants, violet flower color (V) is...Ch. 19 - Figure 19.4 Do you think genetic drift would...Ch. 19 - Figure 19.8 In recent years, factories have become...Ch. 19 - What is the difference between micro- and...Ch. 19 - Population genetics is the study of: how selective...Ch. 19 - Which of the following populations is not in...Ch. 19 - One of the original Amish colonies rose from a...Ch. 19 - When male lions reach sexual maturity, they leave...Ch. 19 - Which of the following evolutionary forces can...Ch. 19 - What is assortative mating? when individuals mate...
Ch. 19 - When closely related individuals mate with each...Ch. 19 - What is a cline? the slope of a mountain where a...Ch. 19 - Which type of selection results in greater genetic...Ch. 19 - When males and females of a population look or act...Ch. 19 - The good genes hypothesis is a theory that...Ch. 19 - Solve for the genetic structure of a population...Ch. 19 - Explain the Hardy-Weinberg principle of...Ch. 19 - Imagine you are trying to test whether a...Ch. 19 - Describe a situation in which a population would...Ch. 19 - Describe natural selection and give an example of...Ch. 19 - Explain what a cline is and provide examples.Ch. 19 - Give an example of a trait that may have evolved...Ch. 19 - List the ways in which evolution can affect...
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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 is a TRUE statement? Non-random mating will increase the number of heterozygotes. Genetic drift within a population will increase genetic variation. Migration into the population will decrease genetic variation. Mutation will decrease genetic variation. Stabilizing selection will increase genetic variation.arrow_forwardDuring mating season, male rams compete with each other for access to females. This describes Group of answer choices intersexual selection intrasexual selection the direct benefits model Hamilton-Zuk hypothesis Fisherian sexual selectionarrow_forwardWhat type of selection occurs when one extreme population phenotype is favored? Group of answer choices genetic drift directional stabilizing disruptivearrow_forward
- Which of these conditions should completely prevent the occurrence of natural selection in a population over time? Group of answer choices The population size is large All variation between individuals is due only to environmental factors The population lives in a habitat where there are no competing species present The environment is changing at a relatively slow ratearrow_forwardSexual selection is kind of natural selection in which characteristics related to mating success are the targets of selection. male features are always the key characteristics selected. competition among individuals of the same sex is always involved. infertility is the most common problem. All of the choices are correct.arrow_forwardWhat must be present in a population for natural selection to act on? Abundant resources A large population size Genetic variationarrow_forward
- A detrimental recessive allele can increase in frequency by way of Group of answer choices founder effects genetic drift heterozygote advantage lower fitness for heterozygotesarrow_forwardWhat effect does stabilizing selection have on a population? The average population moves toward one extreme. There is more genetic variability. The average population favors both extremes. There is less genetic variability.arrow_forwardPopulations evolve by means of natural selection Group of answer choices True False Population genetics is the study of the frequency of alleles in a population Group of answer choices True Falsearrow_forward
- Natural selection is based on all of the following except individuals who survive longer tend to have more offspring than those who die young genetic variation exists within populations Individuals adapt to their environments and, thereby, evolve populations tend to produce more offspring than the environment can support the best adapted individuals tend to reproduce morearrow_forwardWhat scenario could lead to the founder effect in a population? Natural selection acting on genetic variation A large influx of new alleles from a neighboring population A few individuals leaving to start a new population in a different locationarrow_forwardWhich of the following is a FALSE statement? Inbreeding non-random mating will increase the number of homozygotes. Directional selection will decrease genetic variation. Migration will decrease genetic variation between populations. Genetic drift will decrease genetic variation between populations. Mutation will increase genetic variation.arrow_forward
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