Biology: Concepts and Investigations - With Access
4th Edition
ISBN: 9781260053777
Author: Hoefnagels
Publisher: MCG
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Chapter 12, Problem 3PIT
Add the terms genotype,
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Give an example of each of the following evolutionary forces: mutation, natural selection, genetic drift, gene flow, and nonrandom mating.
Which of the following is a change in allele frequency due to chance alone?
Founder effect
Gene flow
Genetic drift
Bottleneck
A. What does it mean if an allele is “fixed”?
B. Explain one reason why EVEN if an allele is undergoing strong positive selection it may not become fixed in the population.
Chapter 12 Solutions
Biology: Concepts and Investigations - With Access
Ch. 12.1 - What are two ways to define evolution?Ch. 12.1 - Prob. 2MCCh. 12.2 - How does the history of evolutionary thought...Ch. 12.2 - What did Darwin observe that led him to develop...Ch. 12.2 - How might artificial selection and natural...Ch. 12.2 - What is the modern evolutionary synthesis?Ch. 12.3 - Prob. 1MCCh. 12.3 - Prob. 2MCCh. 12.3 - How can natural selection favor different...Ch. 12.3 - Prob. 4MC
Ch. 12.3 - Prob. 5MCCh. 12.4 - Prob. 1MCCh. 12.4 - Prob. 2MCCh. 12.4 - Prob. 3MCCh. 12.4 - Prob. 4MCCh. 12.5 - Prob. 1MCCh. 12.5 - Prob. 2MCCh. 12.6 - Prob. 1MCCh. 12.6 - What is the difference between intrasexual...Ch. 12.7 - Prob. 1MCCh. 12.7 - South China tigers have two color patterns...Ch. 12.7 - Prob. 3MCCh. 12.7 - Prob. 4MCCh. 12.8 - What hypothesis did Conover and Munch test?Ch. 12.8 - Prob. 2MCCh. 12 - Prob. 1MCQCh. 12 - Prob. 2MCQCh. 12 - What is the most accurate way to ex plain the...Ch. 12 - Prob. 4MCQCh. 12 - Prob. 5MCQCh. 12 - Prob. 6MCQCh. 12 - List and describe five mechanisms of evolutionCh. 12 - How did James Hutton, Georges Cuvier,...Ch. 12 - Explain how understanding evolution is important...Ch. 12 - How does variation arise in an asexually...Ch. 12 - Write a paragraph that describes the connections...Ch. 12 - Explain how harmful recessive alleles can persist...Ch. 12 - Fraggles are mythical, mouselike creatures that...Ch. 12 - Prob. 8WIOCh. 12 - Jellyfish Lake, located on the Pacific island of...Ch. 12 - Prob. 10WIOCh. 12 - Review the Survey the Land scape figu re in th e...Ch. 12 - Describe a s ituation in which each of the five...Ch. 12 - Add the terms genotype, phenotype, allele...
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- TRUE/FALSE. Disruptive selection creates alleles that increase genetic diversity in a population. If false explain why and if true explain whyarrow_forwardThe founder effect is a type of (genetic drift / gene flow) in which individuals in one small group of a large population (establish a new distant population / are the only survivors) and then reproduce.arrow_forwardSexual and Ecological selection often oppose each other: give 2 examplesarrow_forward
- Natural selection is known to modify the population, stating that “the fittest individuals survive and reproduce, passing on their traits from generation to generation”. Give an example.arrow_forwardCompare and contrast how the bottleneck effect and the founder effect can lead to genetic drift.arrow_forwardName an evolutionary force that decreases genetic variation in a population.arrow_forward
- Which is an example of an evolutionary adaptation? Group of answer choices constancy in the rate of accumulation of genetic changes in a molecule over time the loss of an allele in a population due to a population bottleneck fixation in a population of a selectively advantageous allele a change in frequency of a neutral allele by genetic driftarrow_forwardINTERPRET DATA In a human population of 1000, 840 are tongue rollers (360 TT and 480 Tt), and 160 are not tongue rollers (tt). What is the frequency of the dominant allele (T) in the population?arrow_forwardDescribe natural selection and give an example of natural selection at work in a population.arrow_forward
- How Can We Measure Allele Frequencies in Populations? Explain the connection between changes in population allele frequencies and evolution, and relate this to the observations made by Wallace and Darwin concerning natural selection.arrow_forwardINTERPRET DATA The genotype frequencies of a population are determined to be 0.6 BB. 0.0 Bb, and 0.4 bb. Is it likely that this population meets all the conditions required for genetic equilibrium?arrow_forwardINTERPRET DATA In a population at genetic equilibrium, the frequency of the homozygous recessive genotype (tt) is 0.16. What are the allele frequencies of T and t, and what are the expected frequencies of the TT and Tt genotypes?arrow_forward
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