Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 23, Problem 4TYK
True or false? Gene flow can either increase or decrease the average fitness of a population. Explain.
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Consider a gene with two alleles, C and M. The table below describes fitness for different genotypes in two populations.
Fitness
CC
CM
MM
Population 1
1.0
1.0
0.6
Population 2
0.9
0.9
1.0
Assume that both populations begin with frequencies of 0.5 for each allele, population size is infinite, and there is no migration between populations. Based on the table, how would you expect the frequency of M to change over time in population 1?
A.) frequency of M will increase
B.) frequency of M will decrease
C.) frequency of M will stay the same D.) frequency of M will change randomly
Consider a gene with two alleles, C and M. The table below describes fitness for different genotypes in two populations.
Fitness
CC
CM
MM
Population 1
1.0
1.0
0.6
Population 2
0.9
0.9
1.0
Assume that both populations begin with frequencies of 0.5 for each allele, population size is infinite, and there is no migration between populations. Based on the table, how would you expect the frequency of M to change over time in population 2?
Consider a gene with two alleles, C and M. The table below describes fitness for different genotypes in two populations.
Fitness
CC
CM
MM
Population 1
1.0
1.0
0.6
Population 2
0.9
0.9
1.0
Assume that both populations begin with frequencies of 0.5 for each allele, population size is infinite, and there is no migration between populations. Which of the following statements is true based on the information you have on these populations?
Chapter 23 Solutions
Biological Science (7th Edition)
Ch. 23 - PROCESS OF SCIENCE In what sense is the...Ch. 23 - 2. Why isn’t inbreeding considered an evolutionary...Ch. 23 - 4. True or false? Gene flow can either increase or...Ch. 23 - 6. In the 1700s and 1800s, royalty in Europe often...Ch. 23 - MODEL Draw a small concept map (BioSkllls 12 )...Ch. 23 - 9. QUANTITATIVE In humans, albinism is caused by...Ch. 23 - Prob. 10TYPSSCh. 23 - Are toucans important to tropical forests? Human...Ch. 23 - QUANTITATIVE Toucans can eat fruits with large...Ch. 23 - 13. Do these data illustrate directional,...
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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
- Consider a gene with two alleles, C and M. The table below describes fitness for different genotypes in two populations. Fitness CC CM MM Population 1 1.0 1.0 0.6 Population 2 0.9 0.9 1.0 Assume that both populations begin with frequencies of 0.5 for each allele, population size is infinite, and there is no migration between populations. Based on the table, how would you expect the frequency of C to change over time in population 1? Group of answer choices A.) frequency of C will increase B.) frequency of C will decrease C.) frequency of C will stay the same D.) frequency of C will change randomlyarrow_forwardA population is solely comprised of 120 A2A2 individuals. 18 A1A1 individuals migrate in and contribute to the mating pool. What is the frequency of A1A2 individuals in the offspring? Answer to 2 decimal places. Hint: Use the Gene Flow table!arrow_forwardConsider a finite population in which individuals carry two alleles at a particular genetic locus. One of the two alleles is currently at a frequency of 0.42 in the population. If the locus is neutral, such that neither allele confers a fitness advantage, what is the probability that this allele is eventually lost from the population?arrow_forward
- What long-term effects can gene flow have on any two populations that are exchanging genes? View keyboard shortcutsarrow_forwardYou are studying gene Q/q in two populations of great white sharks. In one population most individuals have genotype QQ, and in the other population most individuals have the genotype qq. If there is some migration from each population into the other, how will this affect genotype frequencies?arrow_forwardIn populations of many organisms there is an inverse relationship between the density of individuals (number per area) and the average size of the individuals. True or False?arrow_forward
- Random events are know to contribute to changes in allele frequencies. Do these random events typically play a greater role when the population size is large or small?arrow_forwardWhat if three genotypes have different fitness levels, so that both kinds of homozygotes are more likely to survive and reproduce than are heterozygotes (only 2% as likely). The population follows all other HWE assumptions. FF fitness level = 1.0 Ff fitness level = 0.02 ff fitness level = 1.0 Will heterozygotes be maintained in the population after 100 generations? Make a graph of the three genotype frequencies over time, to show the answer. (include a graph)arrow_forwardA population of horses in the magic land is having a problem. Individuals are not mating randomly and they are only mating with those that have the same flying speed as their own: Fast (FF), Medium speed (FS), or Slow (SS). You arrive to this magical land and count the following horses of each flying velocity: Fast = 71 Medium speed = 90 Slow = 31 If we consider these results Generation 1, what are the expected number of Medium speed individuals for each genotype in Generation 3 if we have only inbreeding, that is, FF only reproduces with FF; FS only reproduces with FS; and SS only reproduces with SS?arrow_forward
- The table below records information on a gene with two alleles, Z and Y, in four different populations. Use this information to answer the following questions. Assuming no migration between populations C and D, what do you predict the frequency of Z ought to be in population C, based on the conditions given in the table? Population Frequency of allele Z Population size Fitness of ZZ Fitness of ZY Fitness of YY A 1.0 200 0.84 0.84 1.0 B 0 320,000 0.84 0.84 1.0 C 0.93 130,000 0.84 0.84 1.0 D 0.99 1,450,000 1.0 1.0 0.62 Group of answer choices A.) 1.0 B.) 0 C.) 0.93 D.) 0.99arrow_forwardIn garden pea plants, round seeds (R) are dominant to wrinkled seeds (r). In an ideal pea plant population exhibiting Hardy–Weinberg equilibrium, 35 pea plants out of 146 have wrinkled seeds. Calculate the frequency of homozygous round pea plants in the population. Show all work. Express your answer using two significant digits:arrow_forwardThe table below records information on a gene with two alleles, Z and Y, in four different populations. Use this information to answer the following questions. If migration were occurring between populations C and D, what do you predict the frequency of Z ought to be, based on the conditions given in the table? Population Frequency of allele Z Population size Fitness of ZZ Fitness of ZY Fitness of YY A 1.0 200 0.84 0.84 1.0 B 0 320,000 0.84 0.84 1.0 C 0.93 130,000 0.84 0.84 1.0 D 0.99 1,450,000 1.0 1.0 0.62 If migration were occurring between populations C and D, what do you predict the frequency of Z ought to be, based on the conditions given in the table? Group of answer choices A.) 0 B.) greater than 0 C.) 1.0 D.) randomarrow_forward
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