CAMPBELL BIOLOGY-W/MOD.MASTERBIOLOGY
11th Edition
ISBN: 9780134683461
Author: Urry
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 23, Problem 4TYU
There are 25 individuals in population 1, all with genotype AA, and there are 40 individuals in population 2, all with genotype aa. Assume that these populations are located for from each other and that their environmental conditions are very similar. Based on the information given here, the observed
- (A) genetic drift.
- (B) gene flow.
- (C) nonrandom mating.
- (D) directional selection.
Expert Solution & Answer
Learn your wayIncludes step-by-step video
schedule02:35
Students have asked these similar questions
According to the Hardy-Weinberg law of equilibrium:
Question 1 options:
A)
In absence of mutation and natural selection, the frequencies of the genotypes will remain stable because no evolutionary change takes place.
B)
In absence of gene flow, the frequencies of the genotypes will remain stable because no evolutionary change takes place.
C)
In absence of genetic drift, the frequencies of the genotypes will remain stable because no evolutionary change takes place.
D)
All of the above.
E)
None of the above.
The MN blood group is of interest to population geneticists because (a) people with genotype MN cannot receive blood transfusions from either MM or NN people (b) the MM, MN, and NN genotype frequencies can be observed directly and compared with calculated expected frequencies (c) the M allele is dominant to the N allele (d) people with the MN genotype exhibit frequency-dependent selection (e) people with the MN genotype exhibit heterozygote advantage
Considering the Hardy-Weinberg theorem’s assumptions, which of the following statements is NOT correct? (Recall that there are certain assumptions that must be true in order for the Hardy-Weinberg theorem to accurately predict genotype ratios in the next generation.)a) The population must be very large so there random genetic drift will not occur.b) No natural selection can occur.c) Mating must be random.d) Individuals must migrate into and out of the population so that gene flow will occur.e) Mutations must not occur.
Chapter 23 Solutions
CAMPBELL BIOLOGY-W/MOD.MASTERBIOLOGY
Ch. 23.1 - Explain why genetic Variation within a population...Ch. 23.1 - Ot all the mutations that occur in a population,...Ch. 23.1 - MAKE CONNECTIONS If a population stopped...Ch. 23.2 - A population has 700 individuals, 85 of genotype...Ch. 23.2 - The frequency of allele a is 0.45 for a population...Ch. 23.2 - WHAT IF? A locus that affects susceptibility to a...Ch. 23.3 - In what sense is natural selection more...Ch. 23.3 - Distinguish genetic draft from gene flow in terms...Ch. 23.3 - WH AT IF? Suppose two plant populations exchange...Ch. 23.4 - What is the relative fitness of a sterile mule?...
Ch. 23.4 - Explain why natural selection is the only...Ch. 23.4 - Prob. 3CCCh. 23 - Typically. most of the nucleotide variabillity...Ch. 23 - Is it circular reasoning to calculate p ond q from...Ch. 23 - Would two small, geographically isolated...Ch. 23 - How might secondary sex characteristics in males...Ch. 23 - Natural selection changes allele frequencies...Ch. 23 - Prob. 2TYUCh. 23 - Prob. 3TYUCh. 23 - There are 25 individuals in population 1, all with...Ch. 23 - Prob. 5TYUCh. 23 - EVOLUTION CONNECTION Using at least two examples,...Ch. 23 - SCIENTIFIC INQUIRY INTERPRET THE DATA Researchers...Ch. 23 - Prob. 8TYUCh. 23 - SYNTHESI2E YOUR KNOWLEDGE This kettle lake forracd...
Additional Science Textbook Solutions
Find more solutions based on key concepts
44. The right edge of the circuit in Figure P24.44 extends into a 50 mT uniform magnetic field. What are the ma...
College Physics: A Strategic Approach (3rd Edition)
The data were obtained from a use-dilution test comparing four disinfectants against Salmonella choleraesuis. G...
Microbiology: An Introduction
MAKE CONNECTIONS Review the description of meiosis (see Figure 10.8) and Mendels laws of segregation and indepe...
Campbell Biology in Focus (2nd Edition)
16.16 Consider the phylogenetic tree below with three related species (A, B, C) that share a common ancestor (l...
Genetic Analysis: An Integrated Approach (3rd Edition)
15. A good scientific hypothesis is based on existing evidence and leads to testable predictions. What hypothes...
Campbell Biology: Concepts & Connections (9th Edition)
Distinguish between microevolution, speciation, and macroevolution.
Campbell Essential Biology (7th Edition)
Knowledge Booster
Learn more about
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
- In a certain population, a previously neutral, homozygous recessive gene (aa) becomes lethal through changed environmental circumstances. The frequency of the recessive allele (q) was 0.5 before the environmental changes. (i) What was the genotype distribution when the recessive genotype was not selected against / selectively neutral? (ii) What will be the allelic frequency after one generation in the altered generation? Assume random mating among the breeding population. (iii) What will be the genotype frequency of the progeny breeding population?arrow_forwardPINE TREE NEEDLES Variation among members of a population can lead to natural selection, but only if two conditions are met: First, the trait must be relevant to an individual's survival and/or reproductive rate. Second, variation in this trait must be heritable, that is, at least partly controlled by genes. a. How might you design an experiment to determine the importance of needle length in determining survival and reproduction? b. How might you test the extent to which needle length is heritable?arrow_forwardA population of mealworm beetles (Tenebrio molitor) called the founder generation-consisting of 150 Black (MM) individuals, 100 Brown (Mm) individuals and 250 Orange (mm) individuals-is established on a remote region of Puerto Rico. Mating within this population occurs at random, the three genotypes are selectively neutral and mutations occur at a negligible rate. (a) What are the frequencies of alleles M and m in the founder generation? Frequency of allele M= Frequency of allele m= (b) Calculate p2, 2pq, q2 and the expected number of MM individuals, Mm individuals, and mm individuals in the population, assuming that the population is in Hardy-Weinberg equilibriumarrow_forward
- The trait that natural selection “selects for” is lifetime Darwinian fitness. If relative matching of the moths to the background is determining fitness differences, is there any difference in other fitness components in the color morphs of Biston betularia that is influencing the direction of evolution in the three populations shown in the graph? Give a reason for your answer.arrow_forwardIf (positive) assortative mating increases in a population, what would expect to happen to genotype frequency over generations? O a) Frequency of the heterozygous genotype will increase. b) Frequency of the homozygous genotypes will decrease. O c) Frequency of the homozygous genotypes will increase. O d) There will be no change in genotype frequency.arrow_forward1.) Which statement below is not consistent with a population in Hardy-Weinberg equilibrium? A.) Genetic drift is occuring. B.) Random mating is occuring. C.) Population size is large. D.) Migration is not occuring. 2.) Sickel cell anemia is an autosomal recessive genetic disorder. Because individuals affected by sickle cell anemia have defective hemoglobin proteins, their blood cannot transport oxygen properly. There appears to be a relationship between the incidence of malaria and sickle cell anemia. Individuals with sickle cell anemia are carriers of the sickle cell allele have some resistance to malaria. Malaria is caused by the parasite Plasmodium and is transmitted between humans by mosquitoes.” If scientists are successful in significantly reducing or eliminating malaria, the best prediction for what will happen to the allele for sickel cell anemia in the population is that it will: A.)not be affected by the elimination by malaria. B.) increase as its selective advantage…arrow_forward
- The trait that natural selection “selects for” is lifetime Darwinian fitness. If relative matching of the moths to the background is determining fitness differences, is there any difference in other fitness components in the color morphs of Biston betularia that is influencing the direction of evolution in the three populations shown in the graph?arrow_forwardShort eyelashes are dominant to extra-long eye lashes. In a large, randomly mating population with no forces acting to change gene frequencies, 1600 people out of 10000 have extra-long eye lashes. a)What is the number of people in the population who are expected to be heterozygous? Show your calculation below. b) Would the frequency of the extra-long lash allele increase, decrease, or remain the same if long-lashed individuals preferentially mated with each other and no one else? Explain.arrow_forwardThe frequency of two alleles in a gene pool is 0.24 (A) and 0.76 (a). Assume that the population is in Hardy-Weinberg equilibrium. a) Calculate the percentage of heterozygous individuals in the population. Enter your response rounded to two decimal places, do not include % sign. b) Calculate the percentage of homozygous recessive individuals in the population. Enter your response rounded to two decimal places, do not include % sign.arrow_forward
- Suppose that, in one generation, the frequency of the A allele is 40 percent (p=0.40) and the frequency of a allele is 60 percent (q=0.60). If this population is in genetic equilibrium, (1) chances of an individual in the next generation having genotype AA would be ___?(2) The probabilities of genotype aa would be ___? (3) The probability of genotype Aa would be ___? Direction: Provide an answer in 1, 2 and 3 question.arrow_forwardSolve and Illustrate the following: A population of birds contains 16 animals with red tail feathers and 34 animals with blue tail feathers. Blue tail feathers are the dominant trait. a) What is the frequency of the red allele? b) What is the frequency of the blue allele? c) What is the frequency of heterozygotes? d) What is the frequency of birds homozygous for the blue allele?arrow_forwardMechanisms for the persistence of genetic variation in a population include:i) antagonistic selection, ii) overdominance, iii) heterosis, iv) inverse-frequency-dependent selection, and v) mutation-selection balance. Describe how mutation-selection balance can act to maintain genetic variation in a population.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSON
Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax
Anatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
What is Evolution?; Author: Stated Clearly;https://www.youtube.com/watch?v=GhHOjC4oxh8;License: Standard Youtube License